* Water Resistant Back Pack with Built in Life Jacket to keep your pup safe during Adventures. Great for hiking, swimming, kayaking, boating, camping, traveling, and beach days! * Lightweight and Comfortable Backpack with Breathable Air Mesh Base Layer. Quick Drying! 2 Sizes available to Accommodates Medium to Extra Large Dogs. 2 Buckle Release Pouches for Storage for your Pup's Necessities. * 2 Easily Detachable Pouches that Float with Removable Foam Inserts for Extra Buoyancy. Adjustable Belly Strap and Chest Harness for Secure Placement. * High Visibility Color Scheme with Reflective Accents on Pouches and Easy Control Handle. Metal Ring Leash Attachment on Chest and Back. Waterproof Zipper. * Large Backpack measures 22x15x3 inches and weighs less than 1 lb. Can accommodate Chest sizes of 25-38 in, Neck sizes of 19-34 in, and Belly sizes up to 35 in. * Medium Backpack measures 17x13x3 in. Can accommodate chest sizes of 21-28 in, neck sizes of 16-28 in, and belly sizes of 14-28 in.