Sturdy nylon construction with a bag on each side and a bag across the top for loads of storage room. Each bag has a zippered opening with storm flap. The side bags have insulation for keeping a lunch or beverage cold. Attaches to any saddle with nylon web straps and clips. The straps fold into their own zippered pocket when not in use. Side bags size: 7" by 9" by 5" Top cantle bag size: 6" by 13" by 5"