Ferrino Silk Liner SQ is a rectangular sheet bag ideal for use in your trekking, trips and trips with overnight stays in huts and hostels. Alternatively, you can also use it inside your sleeping bag for greater hygiene and to improve thermal comfort. Being made of silk, it is part of Ferrino's line of more compact and lighter sheet bags, so you can also forget it at the bottom of your backpack and always have it available when you need it! Ferrino Silk Liner SQ sleeping bag liner