Cotton Imported ✅ SKIN FRIENDLY –100% cotton. The sleeping bag liner adopts the environmental printing and dyeing, skin-friendly and non-irritating, not easy to fade. With a smooth touch, high strength that can withstand washing. No fuzzing and static electricity ✅ PRACTICAL DESIGN - Pillow cover equipped, the travel sheet is effective to keep clean and comfort. With side opening tear-resistanet design, it can also reduce the risk of ripping the sleeping sheets when turning over during sleep ✅ HIGH BREATHABILITY - There is a zipper on the bottom, increase the breathability when opening, keep it warm when closed. In addition, because the camping sheet of cotton has high water absorption, the cotton sleeping bag liner can absorb moisture and discharge it out. Night sweats can also be absorbed quickly ✅ GENEROUS SPACE: 3 sizes are available. The sleeping sheet is 31.5" x 90.55"(80cm x 230cm) & 47" x 90.55"(120cm x 230cm) & 70.9 x 90.55" (180cm x 230cm) which gives ample space for people of all sizes to move around and stretch out the legs ✅ EXTENSIVE APPLICATION - The sleeping sack is cool in summer and warm in winter, applicable throughout the year. Can be folded in compact, comes with storage bag, easy to carry. Ideal for Business Trips, Traveling, Camping, Hotels, Mountaineering, etc TRIWONDER sleeping bag liner for camping, hotels, trips, trains, etc.