Purchased a few years ago and never used. Stored at home. I am selling it because I have no use for it. There are no noticeable stains. I'm not sure of the size, but I think I bought either M or S... Please check the images for size details. The following is quoted from the BCOZZY website: Features: Machine washable BCOZZY Neck Back-Up Pillow Care Instructions: Machine washable. The BCOZZY Neck Back-Up Pillow is an all-around pillow with a unique ergonomic design that provides all-in-one support for the head, neck, and chin. The main feature is the chin support, which allows you to easily adjust the height of your chin by tightening or loosening the front part. Also, the part that touches the neck is thinner than other parts, and the design prevents the neck from being pushed out, preventing the chin from dropping. It's easy to use, just wrap it around your neck. It can be folded in half and used as a pillow by placing your shoulders on it like a horse saddle, making it ideal for when you are sitting in the middle seat of an airplane or train. It is perfect for long-distance travel, as well as for long hours of PC work or watching TV. It can also be used to support your buttocks and lower back in the office.