There is a lightweight aircraft aluminum buckle on the neck. The buckle makes it easier for the dog to put it on and take it off. The colorful webbing made of 3M reflective nylon thread is soft, comfortable, strong and resistant to pulling. Walking at night improves the dog’s visibility. Lightweight aluminum alloy D-shaped buckle used to reduce the dog’s load, anti-rust and durable. The mesh lining sandwich is breathable and cooling, and the fabric is soft and comfortable. Four-point adjustment, adjust the size and comfort, more suitable for the shape of the dog’s body, more uniform force, more comfortable packaging .