These lightweight and very compact technical mats are ideal for mountaineering and backpacking trips. Features: - Die-cut open-cell foam for rapid inflation/deflation, excellent insulation and extra comfort on rough or uneven surfaces - Top Fabric: Lightweight and durable, TPU-coated diamond rip stop nylon fabric with an anti-slip surface to help reduce sleeping bag slippage - Bottom Fabric: Heavy-duty, TPU coated nylon with a non-slip surface - Top quality, super strong brass valve for quick and easy inflation and deflation. Will not break in sub-zero weather - Comes with a stuff sack and repair kit Specifications: - 3/4 Length - Size: 48" x 20" - Thickness: 1.5" - Weight: 1 lb. 5 oz. - R-Value*: 3.2 * The R-value is a measure of insulating properties. It describes an item's resistance to heat flow. The higher the R-value number, the slower heat will escape. To achieve the listed Chinook R-values, ensure your mattress is fully inflated