ATTENTION - Be sure to measure the widest part of your pet's chest and neck before ordering. Then refer to the size chart. DO NOT CHOOSE SIZE BY WEIGHT ONLY. Perfect for extra small, small and medium breedsSAFETY REFLECTIVE DESIGN - Highly reflective 360 strips and 4 wide reflective stripes provide good visibility in the dark. The choke-free design protects the dog's trachea and throat from being pulled and choked. There is also a quick release buckle for added securityADDITIONAL FUNCTION - The D-ring on the front can be used to attach your pet's ID tag and dog tag. Clip-on LED light. There is a separate loop on the back to hold your dog's poop bags. We hope these little designs make your leash walk more enjoyableBREATHABLE AIR MESH - Made with a soft mesh fabric that is comfortable, lightweight, easy to clean and quick drying. It allows the dog's body temperature to diffuse outward multi-directionally through the vest. Even if your dog is playing or running wildly outside, it won't get stuffyEASY ON AND OFF - It takes seconds to put on and take off the harness, especially suitable for dogs who only like harnesses go over their heads. Just put their front feet in the hole, close the hook and loop fastener and snap the buckle, done