The Klymit Inertia 'O' Zone Inflatable Sleeping Pad is one of the lightest inflatable air pads available anywhere, but with the 'O' Zone's built in pillow, and with the warmth of loft pockets and the support of custom pressurization, your outdoor ultralight pursuits just got a whole lot more comfy. Perhaps the most amazing thing about the 'O' Zone is that it inflates in just 5 breaths. The 'O' Zone is body mapped to cushion all the places where you would likely feel the ground. The parts of the pad you don't touch are removed leaving the 'O' Zone's or holes. The holes are Loft Pockets which allows your sleeping bag to loft through the holes and keep you warm whether the pad is in your bag or under it. The Self Centering Pillow w 4 of cushioning is attached and keeps your head centered on the pillow and is extremely comfortable. Klymit Inertia 'O' Zone Lightweight Full Size Inflatable air pad lets you sleep better Inflates easily 5 breaths deflates quickly Body Supporting, Adjustable Inflation and Loft Pocket design means more comfort and bag efficiency your sleeping bag adds R value because it 'lofts' through the pockets Attached Pillow is self centering cradles your head and keeps it on the pillow reducing neck stress Packs small 30D Polyester Top75D Polyester Bottom Repair kit included and Stuff Sack included Loft Pockets save weight and add warmth Weight 12.2 oz. 346 grams Inflated Dimensions 72x21.5x1.75 1.83m x 0.55m x 44mm Pack Size 6x3 Materials Polyester top and bottom Color blue Comfort Zone is 10 degrees F 90 degrees F.