The Sea to Summit Reactor Extreme Sleeping Bag Liner with Drawcord is perfect for cold climates. This mummy-shaped liner, made with Thermolite® Pro fabric, uses infrared technology to reflect your body's heat back to you, enhancing warmth. It features an adjustable drawstring hood, packs into its own Ultra-Sil stuff sack, and offers easy care with biocide-free odour control, ensuring comfort and versatility in varying conditions.Smart Design: The technical mummy-shape with a drawstring hood ensures a snug fit and extra warmth.Low Maintenance: Easy care design allows for hassle-free maintenance and cleaning.Compact Storsge: The liner conveniently packs into its own Ultra-Sil stuff sack for compact storage.Odour Control: FFL biocide-free effective odour control keeps the liner fresh and odour-free. Sea to Summit Reactor Extreme Sleeping Bag Liner with Drawcord