Hamilton Adjustable Nylon Dog Collars come in a vibrant rainbow of basic solid and fashion colors that are made from only the finest first run, premium grade nylon. Which ensures durability and safety. High thread count webbing creates unmatched quality. Cuts that are finished away from the pet's coat out performs competitor products in comfort, strength, flexibility, and endurance. Collars are fully adjustable to perfectly fit all breeds and the unique O ring placement enhance the collar's strength.