Insulated air sleeping pads have become increasingly popular and are a common sight at camping sites. However, they come with one danger: sharp objects can puncture the pad. Many people use a separate foam mattress under their air mattress, and this is the perfect product for that use! The Robens ZigZag UL packs into a thin sheet and provides extra protection for the air pad. It can also be used to add structure to the back of an ultralight backpack. And once the base is on, it can also serve as a seat pad for camping. - The material does not absorb water - Standard size: 182 x 51 x 0.3 cm - The R-value is 0.5, meaning this pad does not add significant insulation