Our Zack and Zoey® Day Trippers are travel packs that pets can wear. Each pet travel pack features two zippered storage pouches that are connected by an adjustable center strip. # A rugged travel pack for pets on the go # Two zippered storage pouches connected by a center strip # Adjusts to balance load and padded for comfort # Features a leash ring, top handle, and reflective strips Size Dimensions Adjusts to Fit Chests Medium 9" x 8 1/2" x 4" 24"-35", Large 11" x 10" x 4" 32"-44". 1. Set the Day Tripper on the back of your pet 2. Adjust bungee cord to widen or narrow the center strip so that it fits comfortably across the back. 3. Loop the padded chest strap across the front of your pet’s chest and connect the buckle. 4. Connect the two belly straps underneath your pet’s belly 5. Adjust straps as needed to provide a snug, comfortable fit AVAILABLE IN ORANGE, RED AND GREEN CAMO.