This chest harness is built using the 3-1 Half Persian weave and anodized aluminum rings. The rings contain no nickel, lead or zinc and are hypoallergenic. They will not rust, oxidize or discolor your skin. They are bright, colorful and light weight. If you choose a secondary color option, please leave me a note in the special instructions to seller section telling me the secondary color that you would like. Also let me know if you would like it built with black, silver or gold chain.