The Flex Cinch Backpack is a top performer in its category. With a durable yet versatile design. The Flex makes a great companion at the gym or on the go. The water resistant body and waterproof base makes it especially great at the beach or pool. Features Cinch-top Closure Padded, Weather-Resistant Exterior Adjustable Shoulder Straps Welded & Waterproof Front Pocket Zipper Interior Water Bottle Sleeve Welded, Waterproof Base Zip-Enclosed Interior Pocket Tote Handles for Grab-and-Go Carry Specifications Materials Exterior Body : 100% Polyester Interior Liner: 100% Polyester Polyester Webbing Straps Details Dimensions: 17.5" x 12" x 7" 23 Liter Capacity