American Power Bands are silicon bands infused with tourmaline powder. Tourmaline is a natural mineral that naturally radiates negative ions. Each band generates up to 1000-1800 negative ions per cubic centermeter. 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.