The Groove's Thin Solid Colored ring is the heart and soul of Groove. We've designed a number of different colors, so that you can choose which one suits you the best! Our Midnight Black exterior and interior colors allow subtlety and style all at once. Our unique and innovative Groove Technology allows your ring to breathe while maintaining comfort. The medical-grade silicone ensures that your ring will remain flexible and comfortable no matter what it goes through. Our silicone rings are the perfect choice for your active lifestyle!