Silicone is non reactive to metals, and is sweat-proof and easy to clean. It makes an excellent choice for a round of golf. It will not attract or twist around gold or sterling silver necklaces, so there is no need to remove your normal bling to accommodate wearing this necklace. Necklace has an easy to close clasp, making putting on and taking off a breeze with no lobster claw openings to find, as you are rushing to the practice T.