Skin-friendly and durable material: The sleeping bag lining is made of soft and lightweight polyester fabric with a breathable texture. Sanding technology improves the comfort of the ultra-light sleeping bag liner and prevents problems such as wrinkling, pilling and fading, ensuring its service life. User-friendly design: The lightweight travel sheet has a button at the top that opens on one side, allowing you to effortlessly slip in and out of the sleeping bag padding cotton. The invisible zipper at the bottom provides ventilation options and freedom of movement for your feet. If you feel hot while sleeping in the sleeping bag lining, you can unzip the bottom zipper. Versatile companion for sleeping bag: Warm sleeping bag liners can be inserted into winter sleeping bags, allowing you to clean the liner instead of the whole bag. It provides extra warmth during winter camping trips. In addition, the lining can be used independently as a summer sleeping bag, suitable for use in all four seasons. One-piece pillowcase: The zippered sleeping bag is lined with a convenient pillow bag that allows you to tuck your jacket into a comfortable pillow while camping. When traveling, you can use pockets to store hotel pillows separately for a more hygienic sleep. Lightweight and easy to pack: The sleeping bag lining measures 45.2 x 82.6 inches (115 x 210 cm) and weighs just 19.7 ounces (560 grams). It easily folds into a compact 9 x 9.8 inch (23 x 25 cm) pocket, making it easy to carry and travel. It saves space in the backpack. Practical comfort: Breathable self-tanning sleeping bags effectively protect your bed, pillows and sheets from lotions, mousses and other self-tanning products while ensuring your ideal self-tanning results; In addition, they allow you the flexibility to move around indoors, making your tanning experience and sleeping time more relaxed and enjoyable