The Sea to Summit Reactor Fleece Mummy Sleeping Bag Liner makes your sleeping bag even cozier on frigid nights! It boasts Thermolite EcoMade hollow-core fibers constructed in a grid pattern to maximize warmth plus, they're 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. This liner is a great addition to your sleeping bag during the colder months and can even be used on its own as a sleeping bag in the summer! Compatible with the Sea to Summit Free-Flow Zip Footbox (not included). 100% polyester. Fits campers up to 6'6". Includes storage case.Manufacturer style #: A3212. 100% polyester Thermolite EcoMade hollow-core fibers constructed in a grid pattern for warmth 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 6'6" Includes storage caseSpecs: 85"L x 31.5"W Packed: 9.8"L x 3.5"W x 5.5"H Weight: 14.8 oz.