The Pet Life ® 'Mooltese' Large-Pocketed Animated Fashion Dog Harness Backpack features an expressive Cow-faced animation that's both fun and functional. The Mooltese dog backpack features a large spacious zippered usable back pocket that is perfect for placing belongings. The Exterior Shell is composed of durable Nylon that is reversed with comfortable Micro-mesh for complete breath-ability and comfort that gently hugs the body. The back of these dog harness features a connecting ring and dual buckles connected to seat-belt-like adjustable nylon straps that connects to all dog leashes. Available in Multiple Sizes. SIZING MEASUREMENTS - (In Inches) SMALL - Length - 5.51" Chest Girth - 14.9 - 17.3" (Smaller sized breeds) MEDIUM - Length - 7.08" Chest Girth - 18.1 - 22" (Small to Medium sized breeds)