All Halo Products offer Sweat Block technology and fits great under helmets. Every Halo Headband included our soft and comfortable Sweat Block water-tight seal that redirects sweat away from your face. All Halo Products are made with High Performance DRYLINE Visa Endurance Fabric. The Dry line Fabric absorbs, evaporates and wicks sweat away quickly while channeling the sweat away from your eyes.