The Megamat is at home in a base camp, van, or any use where weight doesnt matter but sleeping comfort does. Self-inflating construction: when you arrive at camp, you simply roll the pad open and open the inflation valve - the pad then begins to suck in air as the filling foam returns to its original shape. Due to the huge volume of this pad, it is delivered with a small pump for easy adjustment, if you want a firmer fill. On the first use, the pump may be a bit lethargic, but as you store it open at home it fluffs up nicely. - The biggest size available: Queen size: 203 x 152 x 10 cm - The R-value describing the insulation is exceptionally high: 8.1, ie the pad works even directly on snow or ice if necessary - Surface fabric 50 denier nylon - Base fabric 75 denier polyester - Insulation fiber 16kg / m³ polyurethane foam - All materials are Oeko-Tex 100 certified - Convenient packing bag with shoulder strap At home, it is advisable to keep the self-inflating pad rolled open and wit