- High quality material. Tactical Dog Collars: The collars are made of 1000D double-layered nylon with a soft coating, featuring a quilted lining with clean, soft seams to prevent irritation to the dog’s skin and coat, and provide a comfortable fit. 2. Hook & Loop D-Ring Velcro Closure: Our dog training collar has a metal D-ring that can be attached to the leash to control your dog and keep him more easily around you. There is a magic adhesive panel on this dog training collar: you can put a medal with his name, or an identification patch, badge and other accessories, for your dog’s recognition. 3. Available in 3 & nbsp; sizes, for medium and large dogs. Size M: Neck Length: 37cm-45cm; L: neck length: 45cm-53cm; size XL: neck length: 53cm-61cm; the collar has a simple design and is comfortable when the dog lies down, as it is free of handles, protrusions, spikes, etc. which can obstruct or interfere with sleep. 4. Double checking the size can reduce the likelihood of receiving the