This is Nitori's N-Cool series BOX pad (semi-double size / gray). It's made with moisture-wicking and quick-drying materials, and is designed to keep you feeling cool and comfortable even in the summer. I used it for about 3-4 months during the summer, but I'm selling it because I'm changing the size of my bed and mattress. There are no noticeable stains or damage. If you'd like to see photos of specific areas, please feel free to ask. I will take additional photos as needed.