The Polycotton is a Sleeping Bag Liner from the brand Sea to Summit. The Expander liner is made from premium stretch-knit polycotton. This construction provides excellent elasticity and more warmth compared to a standard cotton Sleeping Bag Liner. Allowing you to move freely during the night, its controlled antimicrobial treatment keeps bacteria at bay. Why go without it? High-quality stretch-knit fabric that can stretch to twice its width Luxuriously comfortable for sleeping Extends the life of a sleeping bag by keeping it clean Anti-Microbial™ protection keeps the liner fresh - hygienic and odor-free Double-folded and reinforced seams Machine washable Liner: 65% polyester - 30% cotton Storage bag: 100% nylon Polycotton - Standard Length: 185 cm Width: 80 cm Weight: 310 g Polycotton - Double Length: 185 cm Width: 160 cm Weight: 620 g Polycotton - Traveller with pillow Length: 225 cm Width: 80 cm Weight: 380 g Polycotton - Mummy (with hood) Length: 210 cm Width: 80 cm Weight: 340 g Polycotton - Long Length: 210 cm Width: 80 cm Weight: 350 g Sea To Summit Polycoton - Sleeping Bag Liner