Updated for 2015! With an ultra-lightweight design, the Therm-a-Rest NeoAir XLite inflatable sleeping pad is built for ounce-counting backpackers. The mattress utilizes an integrated truss system and a heat-reflecting interior to achieve a 3.2 R-value.Unlike the limited number of vertical baffles employed by most traditional inflatable pads, the NeoAir XLite utilizes horizontal air baffles. While minimizing convective cooling, Therm-a-Rest's Triangular Core Matrix technology and the increased number of baffles help to increase stability and avoid the inflatable raft feeling caused by overinflated vertical baffles. In addition, a patent-pending internal reflective barrier actually directs heat back to your body and cold air back to the ground!The inflatable construction provides a full 2.5 thick support base. Ultra-lightweight, high-tenacity materials offer durability while maintaining an incredibly light packed weight. And soft, textured non-slip surface fabrics offer next-to-skin comfort that’s also quiet when you move around on the mattress. When deflated the NeoAir XLite packs down as small as a 1-Liter water bottle.The Therm-a-Rest NeoAir XLite is available in Small (20 x 47), Regular (20 x 72) and Large (25 x 77) size options. Adding additional value, a stuff sack and field repair kit are included.