SUGGESTION --- Please measure your pet's chest size accurately before you choose this one. (Take the measurement of your cat or dog's girth snug against their fur, then add 2-3cm to that measurement for comfort.) Chest Size: XS: 25-30cm, Leash Size : Approximately 120cm long by 1.7cm wide. REFLECTIVE TAPE AND MATERIAL DESIGN --- Made of high quality soft mesh, comfortable and breathable. Reflective strips on chest and edges, cat or dog harness strips, makes them visible in low light. Improves safety during a night walk. ADJUSTABILITY --- Adjustable harness for dog or cat, the harness has adjustable buckles. Used with velcro, it allows fine adjustment to stay comfortable (used for small pets that adapt to bust size: cats, dogs, rabbits, ferrets, hamsters, etc). DURABLE AND ULTRA COMFORTABLE AND EASY TO CLEAN --- Machine wash cold and tumble dry low, soft nylon, easy to clean, covered with breathable and adjustable mesh, your friends won't choke it or not overheat it when running. This new mesh type of the lightweight harness is more breathable and more comfortable, without damaging dog or cat hair. FRIENDLY TIPS --- Your satisfaction is our first priority. If you have any questions, please contact us immediately and we will resolve them. Most kids need to take a while to get used to it, or bribe them with snacks to get them more and more used to wearing harnesses (Kitten is an escape expert, please guide them patiently to get used to wearing harnesses harness).