The step in design is easy to put on and off：No pull dog harness is easy-to-wear vest harness on and off your puppy in seconds. harness for small dogs, harness for medium dogs. Velcro that does not stick to pet hair：High viscosity velcro prevents pets from breaking free, and at the same time prevents pet hair from being damaged by velcro.dog harness for medium dogs no pull, dog harness for small dogs no pull. Jacquard mesh lets pet have a wonderful summer：Jacquard fabric is a special knitted fabric, which is flexible, light, breathable, comfortable, three dimensional and soft. It has extremely high durability, tensile resistance, tear resistance and fusion resistance. It has the characteristics of moisture absorption and perspiration, creating dryness, giving pets an extraordinary wearing experience. Cover reflective strip whole body：This harness can be seen even in low visibility conditions or dark night, making it easier to control dogs and ensuring the safety of walking at night. Attention not directly correspond to your pet's breed or weight：Please measure your pet’s chest (full part) girth and neck girth before purchase. sizing does you can refer to our size guide and sizing chart for the best fit. if in between sizes, please order one size up. XXS Dog Harness：Neck Range: 8.5'-9.5", Chest Range:10"-11.5" XS Dog Harness：Neck Range: 9.5"-10.5", Chest Range:11.5"-13.5" Small Dog Harness：Neck Range: 10.5"-12", Chest Range:13.5"-16" Medium Dog Harness：Neck Range: 12"-13.5", Chest Range:16"-18" Large Dog Harness：Neck Range: 13.5"-15.5", Chest Range:18"-19.5"