describe Material: Polyester Soft and lightweight. Perfect for everyday walking, jogging, training and all outdoor leisure activities. Dogs can walk freely in it and will love it The chest pressure is even and safe, preventing pulling and suffocation, and protecting the dog’s delicate trachea and neck pain-free. Reflective strips: With reflective strips, your dogs and cats can see in low light conditions. Improve the safety of walking at night. Size: XS: Bust 23-27cm (3 catties) S: Bust 28-33cm (4-5 catties) M: Bust 35-39cm (6-9 catties) L: Bust 40-44cm (10-14 catties) Reflective design for night travel, this pet chest strap is designed with reflective logos and reflective stripes to effectively avoid night light problems. If your pet gets lost, you can find your lost pet more easily, making your night travel safer. Safe and comfortable pet chest strap with breathable mesh. Decompression night reflections look exquisite. Soft and comfortable. Three-dimensional overall structure, easy