The Halo I is the original headband that started it all. The design is a headband that ties in the back to create a custom fit for the wearer and includes all the features that make Halo Headbands the best functioning headbands on the market. Dryline® Fabric and the patented Sweat Seal Grip Technology make this headband popular with cyclists, runners, lacrosse players and any athlete looking for a custom fitted headband.