Doot’s products are handmade in the USA using high quality materials. Each collar is made with durability in mind and we offer several heavy duty upgrade options. We are passionate about pets and proudly give back to help homeless pets in our community. Our Christmas Bulk Collars Doot's choice of patterns. You will receive a random selection Choose from specific sizes, a mix, or add in leashes too! All sets will include 1 of each size in the same pattern except for the "All different patterns set". MD- 12-17.5" LG- 13.5-21" XL- 17.5-28" - 1” heavy nylon 4,200 lb strength or super heavy nylon 6,100 lb strength. - YKK side release plastic buckle or upgrade to metal in customization field. - Metal slide for size adjustment (older or smooth nylon designs may use plastic) - Metal or plastic keeper - Welded triangle ring for hooking leash and tags is stronger and more reliable than standard D ring - Triple stitched box stitch, heat cut webbing and treated ribbons for product performance