1. material: The outer layer of our dog harness is made of polyester fabric for a softer and more comfortable feel. The interior features dense small perforated mesh cloth, enhancing breathability, with tightly woven threads that resist sticking to dog hair. 2. Size: XS (Bust 2629cm) for pets under 1.5 kg. S (Chest girth 3034cm) for pets weighing 1.53 kg. M (Bust 3540cm) for pets weighing 34.5 kg. L (Bust 4146cm) for pets weighing 4.57 kg. XL (Bust 4752cm) for pets weighing 7.510 kg. Please measure your pet's size accurately before ordering. 3. Reflective and Safe: The reflective design ensures visibility in lowlight or dark conditions, enhancing safety during nighttime walks. The veststyle design evenly distributes pressure across the chest and shoulders, reducing strain on your dog. 4. Easy Control: Our dog harness includes an alloy Dring on the back, suitable for daily walks, outdoor training, hunting, and more. Attach a leash to guide your pet during walks, runs, shopping, or exercise, ensuring both freedom and safety.