1. Harness Size Guide: S: Neck girth 6', Chest girth 8.5'; M: Neck girth 7', Chest girth 10.5'; L: Neck girth 8.5'10.5', Chest girth 12.5'15'; XL: Neck girth 10.5'13', Chest girth 14'17'; XXL: Neck girth 12.5'15.8', Chest girth 16'21'. Measuring your cat's body accurately is essential—please don't skip this step! If your cat's measurements fall between sizes or are close to the upper limit, we recommend choosing the larger size for the fit and comfort 2. BREATHABLE COMFORTABLE: The nonpilling polyester fiber surface and breathable mesh meet the needs of longtime use. The veststyle design can evenly distribute leash pressure across the chest and shoulders to prevent choking or neck strain, which much more comfort and security 3. SAFE CONVENIENT: Hook and loop and quickrelease buckle make the wearing be easier, and help to prevent your kitty from wriggled out. Strong double D ring Create outdoor sports for your cats 4. DURABLE LEASH: A matching leash will be provided as a gift. The highquality leash features a strong hook and handle loop, making outdoor walking and easy