ATTENTION - Make sure measure the widest part of your pet's chest and neck before placing the order. Then refer to the sizing chart. DON'T CHOOSE SIZE BY WEIGHT ONLY. Perfect for extra small,small and medium breeds | SAFETY REFLECTIVE DESIGN - The 360° highly reflective strips and 4 reflective wide bands provide good visibility in the dark. No-Choke design protects dog's trachea and throat from pulling and choking. There is also a quick-release buckle for extra security | ADDITIONAL FUNCTION - The D ring in the front can be used to attached your pet ID tag and clip-on LED light. There's a seperate loop on the back to hold your dog poop bags. We hope through these little designs,your leash walking will be more enjoyable | BREATHABLE AIR MESH - Made with soft mesh fabric which is comfy,lightweight, easy to clean and quick-dry. It allows the dog's body temperature to diffuse outward in multi-directional through the vest. Even if your dog is playing or running wildly outside,it won't be stuffy | EASY ON and OFF - It takes seconds to take on and off the harness,especially suitable for dogs don't like harnesses go over their heads. Just put their front feet into the hole,close the hook and loop fastener and snap the buckle,finished