All Season Fleece Sleeping Bag Liner Adds Up to 27°F/ 15°C, Lightweight Mummy Sleeping Sack for Cold Weather and Winter Backpacking, Camping, Traveling with Drawstring Hood and Stuff Sack E629Fill Material : Sleeping bag liner No fill Material Add up 27F 15C top to your sleeping bag Made in Taiwan THICKER & WARMER: Our lightweight sleeping bag liners are made using thick, soft and lightweight fleece to provide you with a convenient way to stay warm and comfy in the outdoors. This all season sleeping bag liner can add up to 27F to your sleeping bag so you can sleep comfortably through the night MADE WITH COMFORT IN MIND: This mummy sleeping