1.DURABLE MATERIAL The dog vest harness is made from soft and breathable nylon materials, very comfortable, heavy duty and well made. It's very suitable for your pet. 2. DESIGN When controlling dog walking or training, it helps the dog become focused and comfortable. Some sponge pads are added to block the buckle, allowing the dog to run ly. 3.FREE ADJUSTMENT The dog vest harness has an adjustable chest strap with a strong release buckle. Once adjusted to the dog's size, with one click, it can be pulled over the neck and stored with the leash. When it's time for a walk, just place the preset loop over the neck, click and you're ready. 4.NO PULLING This harness is easy to put on and take off, eliminating the struggle to get the dog's legs in. The dog won't choke even if it tries to pull. It's suitable for a walk or a training session.