Inspired by love and passion for the nights of an eternal summer. - Waterproof - Wear it in the sea, pool or in the shower - Heat and sweat resistant - Wear it during workout - No discolouring or tarnishing - Hypoallergenic (No green skin) - Lifetime warranty - Designed in Copenhagen Size S (6cm Diameter ) Size M (7cm Diameter) (Fits more than 95% of our customers)