The lyocell, an environmentally sustainable fiber, which are also biodegradable and compostable. Lightweight & Durable - Travel sheet liner in single luxury size only weights at 500g (1.1 lb). It can folded into a practical 20x20cm (8x8") pocket for saving space. It is very portable and lightweight. Easy to carry for travel use and save space in your backpack. Smooth Side Tearaway Zipper - Just sit up, "rip" the zipper. You can go out very easily by "ripping" the zipper smoothly, rather than using your fingers to pull the zipper to the bottom. You can open the zipper very easily like ripping a piece of paper. Double-sided Usable Design - There's a almost full lenght zipper on the left side, so you can easily go to bed from the left side. But you can also use the sleeping bag in reverse when you need to go to bed from the right side. 100% Austrian Lenzing AG Tencel Material- It feels super amazing soft, softer than any of the cotton or cotton-blended. Excellent drape, doesn’t wrinkle easily, and holds dye well. It’s also breathable and manages moisture so it helps with temperature regulation. Imported. 100% Austrian Lenzing AG TENCEL material. Also come with a free pure silk sleep mask to perfect your travel.