Sleep clean anytime without dirtying your sleeping bag. [Overview] This is an envelope-type inner sheet (inner sleeping bag) that can be used inside a sleeping bag. It is lightweight and easy to carry, and is useful in a wide range of situations such as mountain hut stays, camping, and car camping. [Problems/Issues] ・Sleeping bags get dirty easily when used directly ・Concern about hygiene with bedding that cannot be washed ・Want to make luggage as light as possible [Solution] By using an inner sheet, you can keep the sleeping bag itself clean without getting it dirty. It is machine washable, making it easy to care for after use. [Changes you get by using it] You can sleep in a clean state at any time, and the sleeping environment during outdoor activities and travel will be stable. It also serves as an auxiliary item to extend the life of your sleeping bag. [Features] ・Envelope type with plenty of room for your feet ・Lightweight design for easy carrying ・Machine washable ・Comes with a storage bag for compact storage [Specifications/Size] ・Expanded size: Approximately 75 x 210cm ・Storage size: Approximately 20 x 20cm ・Weight: Approximately 380-400g ・Material: Polyester ※There may be some size errors due to overseas products. [Usage scenarios] Camping / Mountaineering / Mountain hut stay / Car camping / Travel / For guests / Disaster prevention/evacuation [About Shipping] It will be shipped by Yu-Packet Post. [Purchase Information] Recommended for those who want to keep their sleeping bags clean and also as an emergency preparedness item. This is an inner sleeping bag that was used when staying at a mountain hut during a mountain climb. It has only been used once and is in good condition. There are no noticeable stains or damage. This is a used item stored at home, so please purchase only if you understand this.