<p>Designed to complement an active lifestyle, Bioflow Sport is a&nbsp;winning combination of patented 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 that stretches&nbsp;over your hand.</p> <p>Available in three&nbsp;sizes:</p> Small&nbsp;fits up to&nbsp;17.5cm&nbsp;wrist circumference Medium&nbsp;fits up to&nbsp;19cm&nbsp;wrist circumference Large fits up to&nbsp;20.5cm&nbsp;wrist circumference <p>Please measure your wrist carefully and order a size that fits comfortably and is not restrictive.&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>