- SIZE: Ensure the perfect fit for your dog by measuring its neck before ordering. Refer to the size chart: M (adjustable 37-46cm), L (adjustable 43-55cm), XL (adjustable 47-66cm). Use a tape measure at the collar's resting point, allowing enough space for comfort. - PREMIUM MATERIAL: Crafted from high-density nylon fabric, this collar is both wear-resistant and tensile-resistant. The backing features soft, thickened diving material that is breathable and shockproof, providing a comfortable experience for your dog. The collar is designed to relieve tension during activities like running and training. - DURABLE DESIGN: This metal collar includes a quick-release buckle and slider, making it easy to adjust and secure. The smooth locking mechanism ensures reliability. A large D-ring facilitates quick and easy leash attachment. - VERSATILE USAGE: Suitable for breeds such as Mastiffs, German Shepherds, Pit Bulls, Labrador Retrievers, and more, this collar is ideal for small to extra-large dogs. It's perfect for various activities including training, patrolling, hiking, hunting, camping, and everyday use. - COMFORTABLE AND FUNCTIONAL: The soft material allows for breathability and moisture absorption, ensuring your dog stays comfortable during any activity. Ideal for running, jumping, traveling, and camping adventures. Choose this collar for a durable, comfortable, and practical solution for your dog's training and everyday needs.