7108 Bora Negative - Ion Sports Ring ( Bracelet ) By using korean natural nephrite and germanium , Borasports . com has developed the " Bora Negative - Ion Sports Ring " Which emits healthful negative ions far infrared rays . This product was not released to the public until repeated functional tests to search optimum emitting values for the highest level of healthy supporting negative ions among various minerals . The germanium is called a dream of an oxygen supplier for a healthy human body . Many of the world - famous sports players at home and abroad are wearing the functional sports ring . Its effective functions are known worldwide . Borasports . com sincerely wishes all a the well - being life in the 21 st century with its stylish andfunctional " Bora Negative - Ion Sports Ring " This functional sports ring developed by Borasports . com emits 2000 ion / CC , which is the same ion value generated from forest natural bathing zones and waterfalls . The product also emits 90 . 2 % far infrared rays . The " Bora Negative - Ion Sports Ring " has a simple design . Various patterns and logos can be printed or engraved on its anodized aluminum surface . * Continuous wearing is good for your healthy . When the ring gets dirt by sweat or dust , it is washable . S p e c ificationMaterialsSilicon rubber , natural nephrite , germaniumEngraved various sports designs , such as golf and inline skating , or various logos on aluminum plate . ShapeFlat ring typeDimension 12 mm ( W ) x 2 mm ( T ) x 160 , 180 or 200 mm ( L ) * Custom Samples . Not to be sold .