Features: Versatile cotton/polyester sleeping bag liner that also works as a travel accessory or lightweight cover-up Ideal for couch-surfing, warm-weather overnights, or adding extra warmth inside a sleeping bag 100% cotton without chemical treatments is gentle on skin Stands alone as a packable layer for travel or nights under the stars Generous side opening can be tied closed for insulation or left open for ventilation Helps keep dirt and body oils out of your sleeping bag with an easy-to-wash removable liner Reversible design fits both right-zip and left-zip sleeping bags Minimalist cinch-hood closure allows one-handed temperature regulation Durable seam construction feels smooth and comfortable against skin Includes a stuff sack for convenient packing