The lightest, most packable, ultralight three-season pad for reliable performance. Completely redesigned from the inside out and R-Value rated by a third party, the Insulated AXL Air pad combines a high-tenacity proprietary nylon rip-stop shell with minimalist internal construction to maximize every ounce for stability and comfort. Constructed with large outer tubes to keep you cradled on top, PrimaLoft Insulation traps body heat and reflects it back, achieving previously unattainable levels of lightweight warmth.