Sea to Summit's lightweight Silk Cotton Travel Liners are constructed from two 100% natural fibres blended together for premium comfort and performance. Ideal for any travel adventure, Sea to Summit's Silk Cotton Travel Liner is perfect for questionable hostel stays, it'll keep your sleeping bag clean and it's machine washable. Lightweight, compact and luxurious, this liner is super soft on skin and is packaged in a handy zippered pouch.