Negative Ion Rings. Silicon rings are sized smaller than metal rings. Order one size larger than your normal metal ring size for proper fit.
American Power Rings are silicon bands infused with tourmaline powder. Tourmaline is a natural mineral that naturally radiates negative ions. Negative ions are believed to increase strength and balance and decrease aches and pains. According to WebMD, negative ions are also believed to increase the levels of serotonin in the bloodstream, promoting better sleep, alleviating depression, improving memory, plus positively affecting many other neurological processes within the body.