Tone on Tone Stitching Available In Pony and Horse Sizes Stainless Steel Hardware Imported Leather Henri de Rivel Advantage Rainbow Training Reins feature a rainbow of green/navy/red/yellow to assure correct contact for beginner and/or therapeutic riders. Rubber grip stops the reins from slipping through fingers throughout the ride. Our training reins also include durable stainless steel hardware for longevity and come in pony and horse sizes.