The Big Agnes Insulated Air Core Ultra Sleeping Pad is an insulated sleeping pad for colder weather camps, down to 15°F. The magic comes in the form of heat reflective Technology coupled with High quality Insulation, preventing the cold ground from sucking the heat straight from your body. The durable nylon rip-stop fabric helps prevent tearing, taking on the constant rigors of living in the Woods for weeks. Pump up your mattress with the High volume valve and get yourself a little shut eye. Until your hiking partner asks if you heard that twig snap in the Woods. Features of the Big Agnes Insulated Air Core Ultra Sleeping Pad Light and compact three season pads Built-in advanced heat reflective Technology Antimicrobial treatment inside the pad prevents microorganism growth Minimalist I-Beam construction reduces weight and provides consistent stability and comfort Larger outer chambers keep you comfortably Cradled in the middle of the pad WRM HL? - Ideal for sleeping pads, this durable, High-loft synthetic Insulation provides exceptional warmth with minimal weight and bulk New double rip-stop improves tear strength and durability by 25% Aviation grade TPU lamination Technology for ultimate durability High volume valve allows for efficient and easy inflation and super-fast deflation One way inflation valve with micro air pressure adjust button Quick deflation valve