Nylon Material, Comfortable to Wear : The heavy duty dog collar is made of double-thick nylon material and lined with padding, which makes it comfortable and non-allergenic for your dog to wear. Adjustable: The dog collars for medium dogs are made of heavy duty metal D-ring and double pin metal buckle with 5 adjustable points.The length can be freely adjusted according to different needs. Magic Sticker Panel Design: The tactical dog collar is designed with magic sticker panels for ID tags, training patches, badges or other accessories with hook and loop fasteners. SIZE: Thick dog collar come in 3 different sizes for you to choose from. Medium (33-43CM/13"-17");Large (43-53.34CM/17"-21");X-Large (45.72-55.88 CM/18"-22").Dog collar with metal buckle are all with a width of 1.5". Multi-Occasion, Multi-Variety: Large dog collar can effectively control your dog while training, patrolling, hiking, jogging, hunting, camping, working, running, jumping, traveling, camping. Suitable for German Shepherds, Border Collies, Rottweilers, Great Danes, Doberman Pinschers, Golden Retrievers, Huskies, Labradors, Alaskan Sled Dogs, and many other medium and large dogs. High Quality Material, Comfortable to Wear : The heavy duty dog collar is made of double-thick nylon material and lined with padding, which makes it comfortable and non-allergenic for your dog to wear. Adjustable: The dog collars for medium dogs are made of heavy duty metal D-ring and double pin metal buckle with 5 adjustable points.The length can be freely adjusted according to different needs. Magic Sticker Panel Design: The tactical dog collar is designed with magic sticker panels for ID tags, training patches, badges or other accessories with hook and loop fasteners. SIZE: Thick dog collar come in 3 different sizes for you to choose from. Medium (33-43CM/13"-17");Large (43-53.34CM/17"-21");X-Large (45.72-55.88 CM/18"-22").Dog collar with metal buckle are all with a width of 1.5". Multi-Occasion, Multi-Variety: Large dog collar can effectively control your dog while training, patrolling, hiking, jogging, hunting, camping, working, running, jumping, traveling, camping. Suitable for German Shepherds, Border Collies, Rottweilers, Great Danes, Doberman Pinschers, Golden Retrievers, Huskies, Labradors, Alaskan Sled Dogs, and many other medium and large dogs.