Thin Ring | Black PearlGroove's Thin Solid Colored ring is is also available in unique, swirled metallic colors. Pairing perfectly with any outfit, our new Black Pearl metallic ring adds a subtle metallic flash. Our one of a kind grooves allow breathability and comfort like you've never seen before with a silicone ring. Designed to keep air in, and moisture out, you can't go wrong with this ring. The medical grade silicone ensures that your ring will remain flexible and