Our flat buckle biothane collars are simple and gorgeous! 1/2 inch biothane with a flat buckle and D-ring for tags and leash snaps. Four gorgeous hardware colors. Endless biothane colors. Washable, stink proof, and durable, biothane is the best choice for adventure dogs! *if your dog requires larger than giant sizing, please select the giant size, and add the actual measured neck size of your dog in the order notes.*