The redesigned Air Core Ultra is a smooth and stable sleeping surface, easier and faster to inflate/deflate, warmer, tougher, lighter, and more packable than its award winning predecessor. Still the most economical warm weather pad available. Rated to 32 degrees. Larger outer chambers keep you comfortably cradled in the middle of the pad. Thickness: Outer: 3.5″/ 9cm Inner: 3.25″/ 8cm. Light and compact warm weather 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. Repair kit included. Construction + Materials. Durable nylon fabric. Aviation grade TPU lamination technology for ultimate durability. High volume valve allows for efficient and easy inflation and super-fast deflation. valve illustration copy: One way inflation valve with micro air pressure adjust button. Quick deflation valve. Spot clean. Imported.