Features of the Exped HyperSleep Winter Sleeping Pad 14 mm Thick Ingenious contour shape Manufactured with hydrogen and without chemical solvents Versatile Of Evazote, a special environmentally clean material Acclaimed for extreme durability and is not rendered useless by thorns, debris nor your crampons Works as sleeping mat Ingenious contour shape for optimal layout in narrow spaces Super-lightweight virtually indestructible purist's mat for 4 season use Dark color for quick drying of condensation