Boost your sleeping bag's warmth for frigid nights with the Sea to Summit Reactor Extreme Compact Mummy Sleeping Bag Liner! Thermolite Pro insulation features hollow fibers with permanent ceramic pigments that absorb the body's infrared rays and reflect them back to you. In addition, Thermolite EcoMade material features hollow-core fibers that are made from 100% textile waste and are GRS-certified, so you can feel good about your choice! The built-in hood, shoulder zippers, and drawcord footbox all work together to help you regulate your temperature throughout the night. You could even wander around camp wearing this thing! HeiQ Fresh odor-fighting technology keeps the Reactor fresher between washings. Compatible with the Sea to Summit Free-Flow Zip Footbox (not included). 100% polyester. Fits campers up to 5'10". Includes storage case.Manufacturer model #: A3207. 100% polyester Thermolite Pro insulation absorbs your body's infrared rays and reflects them back to you Thermolite EcoMade hollow-core fibers made from 100% textile waste and are GRS-certified Built-in hood, shoulder zippers, and drawcord footbox for temperature regulation HeiQ Fresh odor-fighting technology Fits campers up to 5'10" Includes storage caseSpecs: 78"L x 31.5"W Packed: 5.9"L x 3"W x 4.7"H Weight: 12.6 oz.