Up Country Ribbon Collars are made of TrakFit strength nylon with sewn in polyester/nylon ties. The rings are beautiful and washable (machine wash cold, gentle cycle, air dry). All neck hardware is cast brass. The quick release buckles are Coast Guard approved for high hold weight. (The collars are not intended to tie out). Machine washable or hand washable, air dry. To determine the correct size use a soft tape measure and go all the way around the middle of the dog's neck where the neck should sit. You will want a size that is at least 1" larger than your neck size.