Sea To Summit ASL051142-060104 Isomat 640 mm 1980 mm zwart

Camping on frozen ground in the Rockies, a mountaineer unrolls the Sea To Summit Comfort Plus XT Insulated Sleeping Pad. The dual-layer Air Sprung Cells™ with THERMOLITE® and Exkin Platinum® insulation deliver an R-value of 6.2, blocking the cold from below. At 10 cm thick, it cushions every pressure point, while the multi-function valve and integrated Airstream™ pump sack make inflation quick even at altitude.

Key specifications

• Insulation: THERMOLITE® with Exkin Platinum®
• R-Value: 6.2 (extreme cold / 4-season+)
• Construction: Extra Thick (XT) Air Sprung Cells™
• Fabric: 30/40D nylon
• Inflated thickness: 10 cm (3.9 in)
• Dimensions: 1980 x 640 mm (Large Wide)
• Packed size: 15 x 28 cm (diameter x height)
• Valve: Multi-function high flow rate
• Pump: Integrated Airstream™ pump sack
• Shape: Rectangular
• Colour: Black
• Pillow Lock System: Yes
• Included: Stuff sack, repair kit

Why choose it

The Comfort Plus XT is built for winter expeditions where warmth and reliability are non-negotiable. Its dual-layer design lets you adjust firmness, while the reflective Exkin Platinum® and THERMOLITE® insulation trap heat efficiently. The high-flow valve and pump sack mean no breath moisture inside the pad, preserving insulation performance over time.

Ideal use cases

• Backpacking in sub-zero temperatures
• Mountaineering base camps
• Cold weather camping and expeditions
• Long-distance thru-hikes in shoulder seasons

Good to know

The pad comes with a repair kit and stuff sack. The Pillow Lock System secures Sea To Summit pillows to the pad for a stable sleep setup.