Velcro attaches the pouch around the waist belt of the ERGO baby carrier Dimensions are 7" (18cm) long by 5" (13cm) high by 3" (8cm) deep 12 ounce 100% cotton canvas with nylon lining Zipper pocket in main pouch Two exterior pockets, one with zipper closure with interior key chain hook Adjustable shoulder strap machine washable, gentle cycle