Big Agnes UL Recovery Sleeping Bag Liner Sleep Better, Recover Faster Get up the next morning ready to get back on the trail with the UL Recovery Sleeping Bag Liner, engineered to help you sleep more comfortably and recover more thoroughly after long days in the backcountry. Integrated CELLIANT(R) bio-ceramic technology has been clinically demonstrated to increase local circulation, improve cellular oxygenation, promote restful sleep, and enhance performance recovery. The soft woven fabric feels great next to skin while protecting your sleeping bag from dirt and body oils, and at just 11 ounces, it adds negligible weight while delivering measurable recovery benefits. Use it solo as a packable layer for travel and warm-weather overnights, or layer it inside any sleeping bag for enhanced comfort and protection. Features CELLIANT(R) bio-ceramic technology is clinically demonstrated to increase circulation, improve oxygenation, promote restful sleep, and speed recovery Soft woven fabric and outside-facing seams feel comfortable against skin while protecting your sleeping bag from dirt, body oils, and general wear Lightweight with reversible design fits either right or left zip sleeping bags and works solo for travel and warm-weather nights Minimalistic cinch hood for customized use Easy to store and wash with included stuff sack SPECIFICATIONSIntended Use Temperature regulation inside sleeping bag Materials Eco-made silk fibers, thermal fibers Fit Unisex - Mummy Shape SIZE CHARTSize Fits Up To Girth (shoulder, hip, foot)Weight Regular6'60" x 54" x 39"11 oz / 310 g Long6'6"63" x 57" x 42"11. 5 oz / 323 g | Big Agnes | Ul Recovery Sleeping Bag Liner