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 microperforated mesh fabric, enhancing breathability, with tightly woven threads that resist pet hair adhesion. 2. Size: XS (Bust 2629cm) for pets under 1.5 kg. S (Bust 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 nighttime conditions, enhancing safety during walks. The ergonomic design evenly distributes pressure across the chest and shoulders, reducing strain on your dog. 4. Easy Control: Our harness features an alloy Dring on the back for leash attachment. Ideal for daily walks, outdoor training, hunting, and more. Simply attach a leash to guide your pet during walks, runs, shopping, or exercise, ensuring both freedom and safety.