<p>Designed to complement an active lifestyle, Bioflow Sport is a&nbsp;winning combination of powerful magnet technology teamed with a durable, waterproof silicone wristband.&nbsp;</p> <p>Each wristband contains a powerful Central Reverse Polarity magnet encased in a smooth and comfortable one-piece strap with an&nbsp;adjustable buckle fastening.</p> <p>The Sport Flex fits wrists measuring 16.5cm - 22cm.&nbsp;</p> <p>Bioflow products should not be worn by anyone fitted with a heart pacemaker or other implant that could be affected by a strong magnetic field.</p> <p>PLEASE NOTE: Bioflow Sport wristbands are made of silicone. Silicone allergy is rare but those who experience it may have symptoms such as rashes and inflammation. Often, any reaction experienced is non-allergic and can be resolved or prevented by following our wear and care guidelines.</p>