I purchased this a while ago and stored it at home without using it. The inside is made of towel fabric, so it seems to feel good against the skin. There's a button on the elastic part, but it doesn't seem like the size can be adjusted. It came with a slide-lock bag when I bought it, so I'll include that too. Size: Waist (when the elastic is most contracted): Approximately 23 cm Rise: Approximately 27 cm Total length: Approximately 45 cm Please refrain from purchasing if you are concerned about minor details due to home storage.