1680D nylon with water-resistant coating and weather-tight zippers. The bags are fully lined with nylon and padded with foam to retain shape and offer protection for your rear. Purchase each piece individually or save and buy as a 5-piece trail system set. WATER POCKET Drawstring top keeps water bottle secure and protected from dirt and weather. The front pocket is a handy place to store keys, cell phone or a snack. Comes with a one liter stainless steel water bottle. An adjustable strap buckles around the pommel of a Western or Endurance saddle, with a D-ring on the back for added stability. A velcro belt attachment is included for out-of-the-saddle use. 9.75" x 5" x 4.5".