Trion:Z NCAA Tennessee Volunteers Active Wristband The water-resistant silicone bands combine negative-ions and magnetic technology in a highly functional design to alleviate sweat absorption. Trion:Z's twin 1000-guass magnets are structured in our patented Alternating North-South Polarity Orientation to provide increased magnetic field flow. Colorful, stylish, and comfortable, Active is worn by over 250 pros on the PGA, LPGA, Nationwide, and Champion's Tours. The negative-ions in Trion:Z's necklaces are released in measurable and significant amounts at rates 50 to 100 time higher than competing brands. Small: 6.8", Medium: 7.6", Large: 8.4"