Sea to Summit Comfort Deluxe Insulated Rectangular Large (2018) | Sleeping Mats | Rock + Run

Sea to Summit Comfort Deluxe Insulated Rectangular Large (2018)


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The Sea to Summit Comfort Deluxe Insulated models combine a luxurious stretch fabric top, a 8cm think layer of Air Sprung Cells and the brand's award winning dual layer design. This mat redefines what comfort in the outdoors means.

The air sprung cells are the core technology of Sea to Summit Air Sleeping Mat range, and are the reason why you will sleep better on a Sea to Summit Sleeping Mat. Instead of the typical baffled construction, Sea to Summit air mats are constructed using a dot-weld pattern to create a high surface-area matrix of interconnected chambers called Air Sprung Cells.


  • Air Sprung Cells operate in the same way as a pocket spring mattress. As each cell deforms independently the mattress conforms to your body shape. This makes for a softer and more comfortable feel with more body contact area and even dispersion of pressure.
  • Comfort Plus series - Dual Layer Design - Dual layer construction uses two independent high resolution layers, giving greater sensitivity by distributing your body weight and shape over more cells. The two layers are offset for more uniform insulation and cushioning. The Comfort Plus range provides the most effective system for fine tuning the level of comfort available in any air mattress today. When on uneven or bumpy terrain the bottom layer of the mattress can be inflated to a high pressure to serve as a barrier. The upper layer can then be adjusted - using the fine tune valve - to a lower pressure for a softer and more comfortable feel. The dual layer design also ensures a level of built-in redundancy. If you do end up with a puncture in one layer of the mattress, then you can still get through the night with the other layer of the mattress intact.
  • Thermal Insulation Technology - Exkin Platinum is a very lightweight, quiet non-woven fabric that has a thin metalized layer applied to the surface. Exkin Platinum thermal technology reflects radiant heat loss back to the user.
  • Thermolite insulation, designed for ultimate performance, is made from specially engineered fibers to achieve a high CLO value with low weight. Thermolite HL-1 high loft insulation is a fiberfill constructed with a unique 3D crimp of hollow-core and solid fibers, which provide excellent lightweight warmth with superior durability. The Thermolite insulation lofts up inside the Air Sprung Cells to prevent convective heat loss from your warm body to the cold ground.
  • Exkin Platinum and Thermolite are combined to great effect in each of the insulated versions of our mats.
  • Multi-Function Valve - To make inflation and deflation easier Sea to Summit has developed the multi-function valve. Our valve integrates an inflate port with a one-way valve to prevent air loss before you seal the valve, a rapid air dump deflate port, and a fine-tune button to adjust for comfort - all in one compact, low profile unit.
  • Inflate and deflate pull tabs are tactile and colour coded for easy identification.
  • 40D Soft Stretch knit top - STS developed the 40D ripstop nylon face fabric to hit the right balance between weight and durability. On the inside they apply a bright white TPU to make the fabric airtight and weldable. On the outside they apply a thin proprietary coating to reduce the slipperiness of the surface, increase puncture with self-adhesive patches.
  • 40D Nylon Internal Fabric - We also developed a lightweight 40D nylon laminated with TPU on both surfaces to create a strong double sided weldable fabric. This is used for the interior of our double layer, offset Air Sprung Cell mats.
  • Extrusion TPU Lamination - STS TPU coating is applied through a process unique to the medical and aeronautical industries. Extrusion lamination is more durable, consistent and enables us to use our own TPU recipe. It is vastly superior to roll-to-roll lamination, which is used in all outdoor products at present and are prone to delamination issues.
  • STS have two superb pump options, the Jetstream and the Airstream. However, for those weight-conscious users who will inflate the mats by mouth, the antimicrobial treatment in the TPU will prevent issues caused by warm, moist expelled breath trapped inside the mat.
  • Stuff Sacks and Repair Kits - All Sea to Summit sleeping mats come with a quality stuff sack sized to suit your mat. Also included is a small repair kit containing six self adhesive patches for repairing punctures in the field, and a spare silicone one-way valve flap.


  • Navy Blue
  • Primary Material: Thermolite Fabric
  • Weight Kg: 1.325 kg
  • Length: 202 cm
  • Width: 64 cm
  • Depth: 8 cm
  • Pack Size: 15cm x 26cm
  • Number of Air Spring Cells: 392
  • Layer Design: Dual Layer