Lightweight and compact technical mats ¨C 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 ripstop 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 stuffsack and repair kit * The R-value is a measure of insulating properties. It describes an item"s resistance to heatflow. The higher the R-value number, the slower heat will escape. To achieve the listed Chinook R-values, ensure your mattress is fully inflated