MONT Helium 300 Sleeping Bag -1°C

Unlock the Wild with Ultralight Comfort. Whether you’re backpacking across the Lake District or tackling a mountain ridge fast and light in alpine conditions, the Mont Helium 300 delivers exceptional warmth with minimal weight, so you can move freely, sleep soundly and wake ready for the next adventure.

Comfort Temperature Rating for warm sleepers: -1°C, cold sleepers: 4°C. These ratings suggest the average user will be comfortable at or around those temperatures. These temperature ratings assume you're using an appropriately insulated sleeping mat, you are well hydrated, well fed and dry.

Standout Features

RADIAL ARC BAFFLE: The Radial Arc Baffle System is a significant design innovation that improves the thermal efficiency of a Mont sleeping bag. Radial Arc baffles curve naturally around your body rather than compressing the down around your body.
When a down baffle (chamber) is bent, ripples in the fabric occur, which will create cold spots and compress down. The radial Arc Baffle System reduces distortion and increases warmth and loft

TUCK STITCHING: Tuck stitching is a construction method that conceals the stitch inside the sleeping bag, thereby protecting it from abrasion and snagging. This is in comparison to top-stitched seams, where each stitch is exposed, which is commonly found in other sleeping bag brands. Tuck-stitched seams are also more water-resistant than top-stitched seams, again because the seam is concealed internally. Tuck stitching attaches the lock-knit baffle to a small fold in the shell material.

TOASTER POCKET: is for slow-release, air-activated heat packs: your toes and feet will never be cold again. 

EXCEPTIONAL PACKABILITY: packs down to approximately 15 × 29 cm, making it ideal for compact riders, fast-packing trips, or multi-day carries.

More Help? For further assistance on choosing your down sleeping bag, we have an article explaining fill power, the pros and cons of down over synthetic insulation and more info on caring for your bag available to view here: A Guide to Down Sleeping Bags.

Features

• Filled with 10.6oz. of 800+ loft RDS white duck down
  
• DWR Loft treatment on down keeps down lofting higher for longer in damp conditions
  
• Outer shell made from ultralight Nylon, 10 by 10 denier, 520 thread count, down proof, 26g/m2
  
• Inner shell made from 15 denier down proof Nylon
  
• Box walled construction for warmth and weight efficiency
  
• Radial Arc Baffle System on horizontal baffles maximises loft height & warmth
  
• Differential cut reduces the potential for cold spot compression
  
• Contoured hood keeps down evenly distributed around your head
  
• Oven door foot venting system for temperature regulation
  
• Tuck stitching for increased durability of baffles
  
• Baffles sewn with Hydrophobic Epic thread which prevents moisture from wicking inside the shell
  
• YKK Full length side and foot zips to increase versatility
  
• Left and right hand models can be zipped together
  
• Oversized 3D draft tube prevents heat loss along zip
  
• Nylon 210 denier laminated anti-snag tape runs along zip
  
• Supplied with ultralight siliconised nylon stuff sack and large storage bag with printed care instructions

Specification 

• Intended use: Hiking/backpacking
• Season Rating: 3-4 Season
• Maximum User Height: Women: 170cm / Standard: 200cm / Long: 200cm
• Cold Sleeper Comfort Temp: -1°C
• Warm Sleeper Comfort Temp: -4°C
• Down treatment: Water-resistant DWR Loft treatment
  
• Max Shoulder Circumference: Women's: 160cm / Regular: 160cm / Long: 170cm
  
• Insulated collar: No
• Shell Fabric: 520 thread count, 10 by 10 denier ultralight Nylon (26g/m2)
• Lining: 520 thread count, 10 by 10 denier ultralight Nylon (26g/m2)
• Filling: Premium white duck down
• Fill power: 800+
• Weight: Women's: 660g / Regular: 680g / Long: 775g
• Fill Weight: Women's: 300g / Regular: 300g / Long: 350g
• Compression Size: 15x29cm(women's) / 15x29cm(standard) / 23x30cm(Long)
• Zip: Women's: Right / Standard/Long: Left
• Zip Configuration: Side & Foot zips. YKK brand zips, dual sliders on side zip
• Colour: Orange/Black
  
• Cut: Mummy