Our BioThane w/Leather Bling Collars are made from the same original BioThane as our other products, with a little sparkle! They are easy to clean, durable and waterproof. We use BioThane Beta 520 Super Heavy material with a soft leather backing. Each BioThane Bling Collar is custom made to order so please allow two weeks for shipping. Sizing for these collars; please measure at line #3 on the dog silhouette. Our BioThane bling collars are sized to the middle hole, for example a 20" collar will fit 18"-22". For more info visit our sizing page.