Size M: Fits well with neck circumference: 48 - 58 cm; Chest circumference: 58 - 76 cm; Easy to put on and take off: This dog harness with a simple buckle design is very easy to put on and take off. The running harness has 2 buckles on one side, you don't need to lift the dog's paw to put on the harness. Extra Control Handle: When your dog is under tension, excitement, or anger, the control handle is more effective than a regular leash for controlling your dog. If the dog behaves unpleasantly, use the emergency brake handle immediately. Breathable Heat Dissipation No-Pull Design: Dog harnesses with soft sponge padding on the back, chest, and neck to protect the skin and to protect your dog's legs. Breathable air mesh keeps your dog cool and comfortable all day. The pulling pressure is evenly distributed over the dog's body to avoid pulling on the neck and head, which leads to choking. Safety when walking - Reflective material for night: The reflective material makes the harness visible in the dark, ensuring your dog's safety during dusk, night, foggy, or rainy days.