1.This seat belt is made of materials and air mesh design;2. The edges with integrated reflective straps, Provides great visibility in the dark.Reflective dog harness will make your dog look very cool and easy to be seen at night, Ensuring your dog is safe when the car is coming;3. It is suitable for daily Walking, Jogging, Training and any outdoor entertainment.Size XXS: Fit for the dog weight 0-1kgXS:chest size 32-40cm, neck size 22-30cm, fit dog weight 1.5-2.5kg;S: chest size 38-44cm, neck size 24-32cm, fit dog weight 2-3kg;M: chest size 43-51cm, neck size 32-40cm, fit dog weight 3.5-6.5kg;L: chest size 50-56cm, neck size 40-45cm, fit dog weight 7-10kg.XL: chest size 54-62cm, neck size 45-54cm, fit dog weight 10-14kg.Package: 1pc *Leash & Harness