I used this once during a 12-hour flight on an overseas trip. There are some scratches on the case. There are no problems with use. I didn't put my mouth on it to inflate it, so it hasn't been in contact with my mouth. Brand: Tabine Kobo (Travel Sleep Workshop) Features: Inflatable, Smooth cotton fabric, Adjustable air volume for your preferred comfort, Ultra-compact, Stain-resistant Color: Dark Gray Size: Extremely Small Material: Air Shape: Semicircular [New design with design patent] Revolutionary new design! The storage case quickly transforms into an air pump. Achieves overwhelming compactness and usability with a unique design that has a design patent. Design registration No. 1771786. [4cm thin, ultimate compact] Amazing thinness and lightness! It's a lightweight and thin design, lighter than three eggs including the case. With a built-in air pump storage case, it's compact and easy to carry. It also comes with a carabiner, so you can attach it to your bag. [Not just portability, but comfort] It wraps around the back of the neck and sides with plenty of air volume. Because it has a good volume, it supports the neck firmly and provides comfortable sleep. You can also adjust the air volume to your liking. [Carefully selected fabric] Uses cotton-like fabric, which is rare for air types. It feels good on the skin and is comfortable to use. [Clean specification without using the mouth] Air is easily inflated by simply pressing the pump. Even women with low lung capacity can easily use it.