I received this as a novelty item with a beverage purchase, but I'm not going to use it, so I'm putting it up for sale. Material: Thick material like a diving wetsuit It's designed to be hooked onto a backpack, etc. After a hike, please soothe your fatigue with Bub (This was received in April 2025). For those who understand that this is a home-stored item. Thank you. *The shipping method may be changed to Rakuraku Mercari Bin.