20mm Run Series Dog Collar are printed recycled straps with a velvety texture, soft and comfortable to wear; quick-release buckles made of high-quality and extremely durable POM(Derlin) plastic; It is made of nickel free plated D rings that are highly resistant to weather conditions, darkening and sudden pulls, which gives you a very long service life. Our comfortable and flexible dog collars are approved for dogs. Our dog collars are very suitable for indoor and outdoor use.