Purchased a few years ago, used twice at a mountain hut. I'm selling this because I bought something else. This one is incredibly easy to inflate and quick to set up. [Product Description] SEA TO SUMMIT Etherlight XT Insulated Mat Size = Small, Outer dimensions 168 x 55 cm, 470g Thickness = 10 cm R-value = 3.2 Synthetic insulation is enclosed within the 10cm thick mat, acting as insulation and preventing cold from the ground. The stuff sack doubles as a pump, making inflation easy. The large valve allows for quick deflation and packing. No smoking, no pets.