Recommendation --- Please measure your pets chest size accurately before choosing this. (Measure your cat or dogs girth near the fur, then add 2-3cm for comfort.) Chest : M: 35-39cm, leash size: about 120cm long. REFLECTIVE TAPE AND MATERIAL DESIGN --- Made of high quality soft mesh, comfortable and breathable. Reflective strips, cat or dog harness strips on the chest and edges make them visible in low light. Improve safety when walking at night. Adjustability --- Adjustable harness for dog or cat, the harness has an adjustable buckle. Used with velcro, it can be adjusted for more comfort (for small animals that adapt to the bust: cats, dogs, rabbits, ferrets, hamsters, etc.). DURABLE, SUPER COMFORTABLE AND EASY TO CLEAN - Machine wash cold and tumble dry low, soft, easy to clean polyester, covered with breathable, adjustable mesh so your friends wont choke or overheat during the day. race. This new lightweight mesh harness is more breathable, more comfortable and wont damage dog or cat hair. grey, size M