Anti-Pull Design: No stress on the dog's neck, pulling pressure is evenly distributed across the body to prevent tugging and choking. Adjustable and Comfortable: The adjustable sliding straps (neck and chest) allow you to create a custom fit for your dog. Thick material with soft padding underneath and lightweight, breathable mesh lining for extra comfort for your pets. Better control: If your dog likes to run you can use the back strap, if you walk the dog you can use the chest strap. It can also be used for training. Safety features: reflective straps with good visibility to ensure your dog's safety during a walk and sturdy handle to attach the seat belt through to secure your dog while riding in your car. Easy to put on and take off: adjustable chest strap and quick release buckle. S: Collar size : 20-26cm Bust adjustment range 30-35cm Recommended weight 3-6kg MNeck circumference24-34cm Bust adjustment range 34-40cm Recommended weight 6-9kg