This is a Sea to Summit Coolmax Adaptor. I used it once and then stored it in the closet. I'm selling it because I don't plan to use it. As shown in photo 6, there is a stain on the back of the neck, so it is a "used item with scratches and stains." If you don't mind, how about it? Sleeping bag liner, inner sheet - When you don't want to touch the futon in a mountain hut directly - Improves the comfort of your sleeping bag - Improves hygiene - Extends the life of your sleeping bag etc. are effective. Shipping will be done by putting it in a Ziploc bag and compressing it, then putting it in an envelope (photo 7). There may be other minor stains or scratches, but please understand that this is a used personal item. Please refrain from purchasing if you are a perfectionist or are overly concerned with details. Please refrain from price negotiations. Instant purchase is OK.