The product description 1. Durable materials - all-day comfort. Our s are made of durable nylon, soft, lightweight and easy to clean, providing a better experience for playful dogs; Suitable for any medium or large dog with the strongest outdoor resistance. 2. Tangle free design - Upgrade your dog-walking experience. The adjustable 36-degree free rotation D ring, which automatically adjusts when you attach the leash to the collar, allows your dog to move from side to side without restriction, without disrupting the leash, allowing dogs to travel easily and happily. 3. Safe design - Be your pet's best companion. 2 reflective lines for safety and increased visibility; It's easy to walk, jog and train at night or early in the morning without worrying about your dog being injured in the dark and not being seen. 4. Loosen buckle - Easy to put on and take off. The neckline buckle is made of specially strong plastic, which is easy to wear when it is loosened quickly, has high tenacity and good closing degree. Due to its light weight, getting dressed only takes a few minutes.