Halo Headbands perform better than any other headband on the market - guaranteed! They keep sweat and sunscreen out of your eyes and off your glasses while racing, training or working out. All products feature the patented watertight seal that keeps sweat out of your eyes and the non-slip surface keeps the band in place. Its lightweight, durable, abrasion resistant and will not lose shape. The headbands feature two thin layers of DRYLINE fabric to evaporate sweat away. Even if the band becomes completely saturated, the SWEAT-BLOCK technology redirects the sweat to the sides allowing you to see clearly, all the time. It fits comfortably under helmets and hats and is hand or machine washable. One size fits all. Recommendation. Our recommendation is that if your head size is larger than 58cm, consider the Halo Headband tie version for a more comfortable fit.