Product DescriptionUpgrade your sleep system with the PolyStretch(TM) Sleeping Bag Liner - designed to add comfort, warmth, and versatility to your outdoor adventures. Made from soft, stretchy knitted polyester, this liner moves with you through the night while boosting the warmth of your sleeping bag by 8-15AdegF.Use it on its own as a lightweight sleeping bag for warmer nights, or attach it inside your sleeping bag with the built-in snap loops for added warmth. Includes a drawstring cinch top for heat retention and a rounded foot box to keep your feet cozy.Weighing just 11 oz (with an additional 12 g for the carry bag), it packs down small, making it a compact, lightweight essential for backpacking, camping, or travel.Key FeaturesSoft, stretchy polyester knit for comfort and mobilityUse alone on warm nights, or attach inside your bag with snap loopsIncreases sleeping bag warmth by 8-15AdegFDrawstring top for customizable heat retentionRounded foot box for extra warmthWeighs 11 oz (carry bag adds 12 g)Lightweight, compact, and easy to washDimensions inside the carrying bag are 7 x 4 inches (non-compressed)Technical SpecsBest UseTemperature Boost, Moisture Control, Lightweight PackabilityMaterialKnitted PolyesterAdded Warmth8-15degFWeight 11 ozDimensions72 x 28 inPacked Size7 x 4 inPack Size8 x 6