{"title":"Sleeping Bag Liners","description":"\u003cdiv class=\"hide-on-mobile\"\u003e\n\u003cp\u003eSleeping Bag Liners are often overlooked and are actually an excellent investment. They are a cheaper and much more hygienic way of keeping your sleeping bag clean, as its much easier to wash and dry a liner than it is a sleeping bag. Sleeping Bag Liners add extra warmth too when used with your sleeping bags in colder conditions, and can also be used as a stand alone cover in warmer climates when it's too hot to sleep in your bag.\u003c\/p\u003e\n\u003cp\u003eThey come in various sizes and are made from different materials, mainly silk, cotton and poly-cotton. Silk liners are soft, light and quick and easy to wash and dry, cotton liners are more cost effective than silk and are warmer than poly-cotton, and poly-cotton liners are the most cost effective, light whilst also being easy to wash and dry.\u003c\/p\u003e\n\u003cp\u003eWe stock a wide range of sleeping bag liners in all sizes and materials for all your outdoor adventures, whether you are camping, traveling or going on an expedition.\u003c\/p\u003e\n\u003cp\u003eShop for sleeping bag liners from leading brands including Sea to Summit from our collection below...\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c\/div\u003e","products":[{"product_id":"sea-to-summit-silk-blend-liner-mummy","title":"Sea to Summit Silk Blend Liner (Mummy)","description":"\u003cp\u003eDesigned with a mummy shape and constructed of Thermolite-silk fabric, the Sea to Summit Silk Blend Liner is enhanced with comfort stretch panels for a supremely soft and opulent feel. The addition of Thermolite-yarn provides added warmth to accommodate varying temperatures year-round. \u003c\/p\u003e\n\u003cp\u003eThe Thermolite EcoMade has been designed with recycled Thermolite EcoMade fibres made from 100% textile waste, are GRS-certified, and offer the same quality and durable lightweight warmth as their polymer virgin counterparts but with a lower carbon footprint. Also features Thermolite Pro which has been designed with specially engineered hollow fibres, similar to traditional Thermolite materials. However, this version also includes permanent ceramic pigments that effectively absorb infrared rays from the body and then reflect them back to the user.\u003c\/p\u003e\n\u003cp\u003eTested in accordance with ASTM D1518-2014, This liner will add +8% thermal boost to a 1-season sleeping bag, and +5% to a 3-season sleeping bag.\u003c\/p\u003e\n\u003cp\u003eThe draw-cord footbox allows you to regulate your temperature more to your comfort. Keep it sinched up to keep in the warmth, if you get a little too hot, then open it up and let your feet breathe. You can also free your arms without taking the liner off, allowing you to carry out various tasks around camp whilst still keeping warm.\u003c\/p\u003e\n\u003cp\u003eEquipped with HeiQ Fresh FFL, a biocide-free, powerful body odour control technology utilizing a bio-based Amino Sugar Polymer to eliminate any unwanted scents.\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSUSTAINABILITY: Fabric is made from a blend of 72% recycled and 28% natural yarns.\u003c\/li\u003e\n\u003cli\u003eYARN 1: 72% Thermolite\u003c\/li\u003e\n\u003cli\u003eYARN 2: 28% natural silk\u003c\/li\u003e\n\u003cli\u003eTHERMAL BOOST: +8% thermal boost to a 1-season sleeping bag, and +5% to a 3-season sleeping bag.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecification\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRegular Dimensions: 206 x 80 cm\u003c\/li\u003e\n\u003cli\u003eCompact Dimensions: 184 x 80 cm\u003c\/li\u003e\n\u003cli\u003eRegular Weight: 154g\u003c\/li\u003e\n\u003cli\u003eCompact Weight: 138g\u003c\/li\u003e\n\u003cli\u003eStuff sack included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Sea to Summit","offers":[{"title":"Standard (Max User Height 198cm)","offer_id":43732996325557,"sku":"SS-SN-SSSBL-STANDARD","price":87.95,"currency_code":"GBP","in_stock":true},{"title":"Compact (Max User Height 177cm)","offer_id":43733144699061,"sku":"SS-SN-SSSBL-COMFORT","price":79.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1554\/2851\/files\/SilkBlendSleepingBagLiner-Mummy-Standard_ASL032051-191802_PRIMARY.jpg?v=1750866020"},{"product_id":"sea-to-summit-silk-blend-liner-w-pillow-case-rectangle","title":"Sea to Summit Silk Blend Liner - w\/ Pillow Case (Rectangle)","description":"\u003cp\u003eSize: Max Use Height: 198cm\u003c\/p\u003e\n\u003cp\u003eCrafted with a rectangular design and a pillow case cover, the Sea to Summit Silk Blend Liner is made of Thermolite-silk material and features comfort stretch panels for a luxuriously plush and extravagant sensation. The inclusion of Thermolite-yarn adds additional warmth to suit fluctuating temperatures throughout the year.\u003c\/p\u003e\n\u003cp\u003eThe Thermolite EcoMade has been designed with recycled Thermolite EcoMade fibres made from 100% textile waste, are GRS-certified, and offer the same quality and durable lightweight warmth as their polymer virgin counterparts but with a lower carbon footprint. Also features Thermolite Pro which has been designed with specially engineered hollow fibres, similar to traditional Thermolite materials. However, this version also includes permanent ceramic pigments that effectively absorb infrared rays from the body and then reflect them back to the user.\u003c\/p\u003e\n\u003cp\u003eTested in accordance with ASTM D1518-2014, This liner will add +8% thermal boost to a 1-season sleeping bag, and +5% to a 3-season sleeping bag.\u003c\/p\u003e\n\u003cp\u003eEquipped with HeiQ Fresh FFL, a biocide-free, powerful body odour control technology utilizing a bio-based Amino Sugar Polymer to eliminate any unwanted scents.\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSUSTAINABILITY: Fabric is made from a blend of 72% recycled and 28% natural yarns.\u003c\/li\u003e\n\u003cli\u003eYARN 1: 72% Thermolite\u003c\/li\u003e\n\u003cli\u003eYARN 2: 28% natural silk\u003c\/li\u003e\n\u003cli\u003eTHERMAL BOOST: +8% thermal boost to a 1-season sleeping bag, and +5% to a 3-season sleeping bag.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecification\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRegular Dimensions: 225 x 80 cm\u003c\/li\u003e\n\u003cli\u003eRegular Weight: 177g\u003c\/li\u003e\n\u003cli\u003eStuff sack included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Sea to Summit","offers":[{"title":"Default Title","offer_id":43733060485301,"sku":"SS-SN-SSSBLPLW-STANDARD","price":87.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1554\/2851\/files\/SilkBlendSleepingBagLiner-RectangularWithPillowSleeve_ASL032051-251803_PRIMARY.jpg?v=1750866018"},{"product_id":"sea-to-summit-comfort-blend-liner-rectangle","title":"Sea to Summit Comfort Blend Liner (Rectangle)","description":"\u003cp\u003eSize: Max User Height: 185cm\u003c\/p\u003e\n\u003cp\u003eThe Sea to Summit Comfort Blend Liner (Rectangle) is a travel liner that provides versatility and reassurance in various climates and environments. It boasts high-quality materials, such as Tencel-poly blend fabric and Tencel Fibers, which effectively remove moisture. This allows you to experience the great outdoors with the luxuries of home.\u003c\/p\u003e\n\u003cp\u003eThis product is made from 70% COOLMAX® fibre and 30% TENCEL™. Lyocell fibre for exceptional temperature regulation and luxurious next-to-skin comfort. Equipped with HeiQ Fresh FFL, a biocide-free, powerful body odour control technology utilizing a bio-based Amino Sugar Polymer to eliminate any unwanted scents.\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSUSTAINABILITY: Fabric is made from 30% sustainably-grown yarn.\u003c\/li\u003e\n\u003cli\u003eYARN 1: 70% polyester.\u003c\/li\u003e\n\u003cli\u003eYARN 2: 30% Tencel lyocell fibres.\u003c\/li\u003e\n\u003cli\u003eHeiQ Fresh odour control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecification\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRegular Dimensions: 185 x 80 cm\u003c\/li\u003e\n\u003cli\u003eWeight: 354g\u003c\/li\u003e\n\u003cli\u003eStuff sack included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Sea to Summit","offers":[{"title":"Default Title","offer_id":43733154037941,"sku":"SS-SN-SSCBL-RECTANGLE","price":27.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1554\/2851\/files\/ComfortBlendSleepingBagLiner-Rectangular_ASL032071-200202_PRIMARY.jpg?v=1750866015"},{"product_id":"sea-to-summit-comfort-blend-liner-w-pillow-case-rectangle","title":"Sea to Summit Comfort Blend Liner - w\/ Pillow Case (Rectangle)","description":"\u003cp\u003eSize: Max User Height: 185cm\u003c\/p\u003e\n\u003cp\u003eThe Sea to Summit Comfort Blend Liner (Rectangle) with a pillow sleeve is a travel liner that provides versatility and reassurance in various climates and environments. It boasts high-quality materials, such as Tencel-poly blend fabric and Tencel Fibers, which effectively remove moisture. This allows you to experience the great outdoors with the luxuries of home.\u003c\/p\u003e\n\u003cp\u003eThis product is made from 70% COOLMAX® fibre and 30% TENCEL™. Lyocell fibre for exceptional temperature regulation and luxurious next-to-skin comfort. Equipped with HeiQ Fresh FFL, a biocide-free, powerful body odour control technology utilizing a bio-based Amino Sugar Polymer to eliminate any unwanted scents.\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSUSTAINABILITY: Fabric is made from 30% sustainably-grown yarn.\u003c\/li\u003e\n\u003cli\u003eYARN 1: 70% polyester.\u003c\/li\u003e\n\u003cli\u003eYARN 2: 30% Tencel lyocell fibres.\u003c\/li\u003e\n\u003cli\u003eHeiQ Fresh odour control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecification\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRegular Dimensions: 225 x 80 cm\u003c\/li\u003e\n\u003cli\u003eWeight: 430g\u003c\/li\u003e\n\u003cli\u003eStuff sack included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Sea to Summit","offers":[{"title":"Default Title","offer_id":43733166489781,"sku":"SS-SN-SSCBLWPLW-RECTANGLE","price":31.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1554\/2851\/files\/ComfortBlendSleepingBagLiner-RectangularWithPillowSleeve_ASL032071-250201_PRIMARY.jpg?v=1750866013"},{"product_id":"sea-to-summit-breeze-lightweight-liner","title":"Sea to Summit Breeze Lightweight Liner","description":"\u003cp\u003eMeet your new secret weapon for outdoor comfort: the Sea to Summit Breeze Liner. This Mummy-shaped liner is packed with Coolmax® Poly Blend magic, this clever little layer keeps you cosy when temperatures play tricks on you. The adjustable drawcord lets you dial in the perfect fit, while the impossibly light design means it barely takes up space in your pack, yet somehow does all the heavy lifting when conditions shift. Whether you're chasing alpine views or settling into your sleeping bag, this versatile liner proves that sometimes the smallest gear makes the biggest difference.\u003c\/p\u003e\n\u003cp\u003eThe Breeze is Perfect For...\u003cbr\u003e- Backpackers traversing a wide scale of temperatures and humidity\u003cbr\u003e- Travellers who would like to ensure a hygienic sleep environment\u003cbr\u003e- Campers looking to reduce the clammy feel in their sleeping bag\u003cbr\u003e- Warm-Weather campers who don’t need a full sleeping bag\u003c\/p\u003e\n\u003cp\u003eOther Liner Options...\u003cbr\u003e- Add warmth to your sleeping bag with a STS Reactor Liner\u003cbr\u003e- Weight-focused backpackers opt for the STS Silk Mummy Liner\u003cbr\u003e- A liner for travellers staying in hotels and hostels, choose the STS Breeze Traveller Liner\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eA breathable 70\/30 blend of bluesign APPROVED Coolmax EcoMade (also RCS-certified recycled) and plush, biobased Tencel Lyocell offers exceptional softness and stretch.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWicks moisture from your skin, keeping you dry and comfortable in humid conditions\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMummy shape features a drawcord to cinch hood around your head. The drawcord channel is contrasting colour to make it easier to find in low light conditions.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEasy care – no special soap is needed for washing.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePacks into its own Ultra-Sil stuff sack.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHEIQ Fresh- Biocide-free odour control treatment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecification\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eUser height: 170cm\u003cmeta charset=\"utf-8\"\u003e(Short). 185cm (Regular). 198cm (Long).\u003c\/li\u003e\n\u003cli\u003eDimensions: 190 x 80cm (Short). 205 x 80cm (Regular). 216 x 80cm (Long).\u003c\/li\u003e\n\u003cli\u003ePack Dimensions: 10 x 18cm (Short). 11 x 18cm (Regular). 11 x 18cm (Long).\u003c\/li\u003e\n\u003cli\u003ePacked Weight: 273g \u003cmeta charset=\"utf-8\"\u003e(Short). 288g (Regular). 302g (Long).\u003c\/li\u003e\n\u003cli\u003eStuff sack included\u003c\/li\u003e\n\u003cli\u003eShape: Mummy\u003c\/li\u003e\n\u003cli\u003eMaterials: 70 % CoolMax Ecomade \u0026amp; 30 % Tencel Lyocell\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Sea to Summit","offers":[{"title":"Mummy \/ Short","offer_id":56765084008821,"sku":"SS-SN-SSBLL-SHORT","price":42.5,"currency_code":"GBP","in_stock":true},{"title":"Mummy \/ Regular","offer_id":56765084041589,"sku":"SS-SN-SSBLL-REGULAR","price":42.5,"currency_code":"GBP","in_stock":true},{"title":"Mummy \/ Long","offer_id":56765084074357,"sku":"SS-SN-SSBLL-LONG","price":42.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1554\/2851\/files\/056303_BreezeSleepingBagLiner_Regular-Mummy_CendreBlue_PRIMARY.webp?v=1771582134"},{"product_id":"sea-to-summit-breeze-traveller-lightweight-liner","title":"Sea to Summit Breeze Traveller Lightweight Liner","description":"\u003cp\u003eThe Sea to Summit Breeze Traveller Liner with Coolmax® Poly Blend provides effective temperature regulation for comfort and peace of mind in the outdoors or while travelling, bouncing between hostels or hotels. The shape and pillow holder make this liner ideal for travelling to varying climates around the world, and the HEIQ odour treatment helps keep your liner fresher and hygienic for longer.\u003c\/p\u003e\n\u003cp\u003eThe Breeze is Perfect For...\u003cbr\u003e- Backpackers traversing a wide scale of temperatures and humidity\u003cbr\u003e- Travellers who would like to ensure a hygienic sleep environment\u003cbr\u003e- Campers looking to reduce the clammy feel in their sleeping bag\u003cbr\u003e- Warm-Weather campers who don’t need a full sleeping bag\u003c\/p\u003e\n\u003cp\u003eOther Liner Options...\u003cbr\u003e- Add warmth to your sleeping bag with a STS Reactor Liner\u003cbr\u003e- Weight-focused backpackers opt for the STS Silk Mummy Liner\u003cbr\u003e- The breeze mummy liner is ideal for mixed temperatures paired with mummy-shaped bags\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eA breathable 70\/30 blend of bluesign APPROVED Coolmax EcoMade (also RCS-certified recycled) and plush, biobased Tencel Lyocell offers exceptional softness and stretch.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWicks moisture from your skin, keeping you dry and comfortable in humid conditions\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSpacious and comfortable rectangular shape for extended use trips\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEasy care – no special soap is needed for washing.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePacks into its own Ultra-Sil stuff sack.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHEIQ Fresh- Biocide-free odour control treatment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecification\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOne Size Fits All\u003c\/li\u003e\n\u003cli\u003eMax User height: 198cm\u003c\/li\u003e\n\u003cli\u003eDimensions: 225 x 80 cm\u003c\/li\u003e\n\u003cli\u003ePack Dimensions: 8 x 11 cm\u003c\/li\u003e\n\u003cli\u003ePacked Weight: 344g\u003c\/li\u003e\n\u003cli\u003eStuff sack included\u003c\/li\u003e\n\u003cli\u003eShape: Rectangle\u003c\/li\u003e\n\u003cli\u003eMaterials: 70 % CoolMax Ecomade \u0026amp; 30 % Tencel Lyocell\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Sea to Summit","offers":[{"title":"One Size \/ Rectangle","offer_id":56765094494581,"sku":"SS-SN-SSBTLL-RECTANGLE","price":38.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1554\/2851\/files\/056304_BreezeSleepingBagLiner_RectangularWithPillowSleeve_CendreBlue_MODEL_2.webp?v=1771583720"},{"product_id":"sea-to-summit-reactor-fleeceweight-liner","title":"Sea to Summit Reactor Fleeceweight Liner","description":"\u003cp\u003eYour secret weapon against freezing nights, without the weight penalty. This Sea to Summit liner harnesses Thermolite® Fleece to deliver serious warmth while staying compact enough to slip into any pack. The stretchy fabric moves with you, armholes keep your shoulders fre\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003ee, and whether you're a restless sleeper or a still one, you'll stay comfortable. Snap it into compatible Sea to Summit sleeping bags for a locked-in fit, or layer it solo inside your existing bag. Machine washable and ready for adventure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMax User Length:\u003c\/strong\u003e 170cm (Short). 185cm (Regular). 198cm (Long).\u003c\/p\u003e\n\u003cp\u003eUsing Thermolite® hollow-core fibres in a grid-fleece construction, the Fleeceweight traps and reflects body heat to noticeably enhance your sleep system’s performance, adding up to 8°C of warmth with minimal added weight.\u003c\/p\u003e\n\u003cp\u003eThe liner is quick-drying and easy to clean, with HeiQ Fresh odour control to stay fresher on extended trips. It also helps extend your sleeping bag’s lifespan by reducing the need for frequent washing, preserving loft and long-term performance.\u003c\/p\u003e\n\u003cp\u003eBest Use For: Backpacking, Camping \u0026amp; Winter Camping.\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFreedom to Move: Thermolite® Fleece fabric and armholes allow unrestricted movement in any sleep position.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThermal Boost: Grid-fleece with hollow-core fibres traps and reflects heat—adds up to 8°C warmth.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBag Compatibility: Fits any sleeping bag; snaps into Sea to Summit bags for secure placement and easy entry\/exit.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExtend Bag Lifespan: Reduces washing frequency to maintain insulation loft and long-term performance.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEasy to Clean: Quick-drying fabric with HeiQ Fresh odour control stays fresher on multi-day trips.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eIdeal for cold-weather backpacking, hut trips, and winter bivvies where extra warmth matters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecification\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eShape: Mummy\u003c\/li\u003e\n\u003cli\u003eAdded up to 8°C Warmth\u003c\/li\u003e\n\u003cli\u003eUser Length: 170cm (Short). 185cm (Regular). 198cm (Long).\u003c\/li\u003e\n\u003cli\u003eWeight: \u003cmeta charset=\"utf-8\"\u003e365g (Short). 400g (Regular). 420g (Long).\u003c\/li\u003e\n\u003cli\u003eStuff sack included\u003c\/li\u003e\n\u003cli\u003eMaterials: Thermolite Pro \u0026amp; Thermolite EcoMade\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Sea to Summit","offers":[{"title":"Short (170cm)","offer_id":56768089031029,"sku":"SS-SN-SSRFWL-SHORT","price":55.5,"currency_code":"GBP","in_stock":true},{"title":"Regular (185cm)","offer_id":56768088998261,"sku":"SS-SN-SSRFWL-REGULAR","price":55.5,"currency_code":"GBP","in_stock":true},{"title":"Long (198cm)","offer_id":56768201752949,"sku":"SS-SN-SSRFWL-LONG","price":55.5,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1554\/2851\/files\/053403_ReactorFleeceweightSleepingBagLiner_Long-Mummy_Picante_PRIMARY.jpg?v=1771600397"},{"product_id":"sea-to-summit-reactor-lightweight-liner","title":"Sea to Summit Reactor Lightweight Liner","description":"\u003cp\u003eBoost your sleeping bag's warmth without the extra heft. The Sea to Summit Reactor Lightweight Liner is your secret weapon for cosier nights. Its stretchy Thermolite® Pro fabric hugs your movements, while clever armholes let you sprawl out freely. The clever bit? Far Infrared (FIR) technology and hollow-core fibres work together to trap and reflect your body heat, cranking up warmth by up to 4°C without the bulk. Snap it into compatible Sea to Summit bags for a snug fit, or slip it into any sleeping bag. Built-in odour control keeps things fresh on long adventures, and it dries quickly too, meaning less laundry and a longer life for your beloved sleeping bag. Lightweight, versatile, and genuinely clever.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMax User Length:\u003c\/strong\u003e 170cm (Short). 185cm (Regular). 198cm (Long).\u003c\/p\u003e\n\u003cp\u003eBest Use For: Backpacking, Camping \u0026amp; Winter Camping.\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFreedom to Move: Stretch-knit construction and armholes provide unrestricted comfort for any sleep position.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLightweight Thermal Boost: Thermolite® Pro with FIR and hollow-core fibres adds up to 4 °C | 7 °F warmth.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEasy to Clean: Quick-drying and machine washable with HeiQ Fresh odour control treatment.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompatible Design: Fits all sleeping bags and snaps into Sea to Summit bags for secure positioning.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eProtects Your Sleeping Bag: Reduces washing frequency to maintain insulation loft and extend bag lifespan.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eIdeal for backpacking, travel, hut stays, and warmer-weather adventures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecification\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eShape: Mummy\u003c\/li\u003e\n\u003cli\u003eAdded up to 4°C Warmth\u003c\/li\u003e\n\u003cli\u003eUser Length: 170cm (Short). 185cm (Regular). 198cm (Long).\u003c\/li\u003e\n\u003cli\u003eWeight: \u003cmeta charset=\"utf-8\"\u003e235g (Short). 255g (Regular). 260g (Long).\u003c\/li\u003e\n\u003cli\u003eStuff sack included\u003c\/li\u003e\n\u003cli\u003eMaterials: Thermolite Pro \u0026amp; Thermolite EcoMade\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Sea to Summit","offers":[{"title":"Short (170cm)","offer_id":56768214335861,"sku":"SS-SN-SSRLWL-SHORT","price":38.95,"currency_code":"GBP","in_stock":true},{"title":"Regular (185cm)","offer_id":56768214368629,"sku":"SS-SN-SSRLWL-REGULAR","price":38.95,"currency_code":"GBP","in_stock":true},{"title":"Long (198cm)","offer_id":56768214401397,"sku":"SS-SN-SSRLWL-LONG","price":38.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1554\/2851\/files\/053203_ReactorLightweightSleepingBagLiner_Long-Mummy_Pewter_PRIMARY.jpg?v=1771601503"},{"product_id":"sea-to-summit-reactor-midweight-liner","title":"Sea to Summit Reactor Midweight Liner","description":"\u003cp\u003eSnuggle up with the Sea to Summit Reactor Midweight Liner, your sleeping bag's best friend. This stretchy fleece layer adds serious warmth without the bulk, and its clever design means you'll never feel trapped, whether you're a sprawler or a fidgeter. Slip it inside any bag for instant cosiness, or snap it into compatible Sea to Summit models for hassle-free layering. Lightweight, packable, and ready for whatever adventure calls.\u003c\/p\u003e\n\u003cp\u003ePowered by Thermolite® Pro with Far Infrared (FIR) technology and hollow-core fibres, the Reactor Midweight efficiently traps and reflects body heat to increase warmth without unnecessary bulk, adding up to 6°C | 11°F when used as part of a sleep system.\u003c\/p\u003e\n\u003cp\u003eUnlike a full sleeping bag, the liner is easy to clean and quick-drying. 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