Comfort Core SI Pad — R-4.2

Engineered for versatile 3-season performance, the Cairn Backcountry Comfort Core SI Pad provides a critical R-value of 4.2 for reliable thermal insulation across backpacking, car camping, and overlanding scenarios. Its 2-inch (5cm) self-inflating design utilizes strategically die-cut open-cell polyurethane foam, optimizing warmth-to-weight while significantly reducing packed bulk. The robust construction integrates a comfortable 50D stretch-knit polyester top fabric with a highly durable 75D polyester bottom, ensuring long-term resilience to trail and camp abuse. Rapid, no-fuss inflation and deflation are managed by the high-flow WingLock valve, making setup and pack-down efficient. Weighing just 880g, this rectangular pad delivers substantial comfort and warmth without adding excessive mass to your kit. Available in regular and long sizes, choose the dimension that best matches your sleep system and preferred coverage.

Technical

Weight	880 g
R Value	4.2
Thickness cm	5
Inflation Type	self-inflating
Shape	rectangular
Fabric	50D/75D polyester