This cycling cap prioritizes functionality, packed with the technology of the HALOheadband. The Halo cycling cap is lightweight and excels at absorbing and quickly drying moisture. It's also treated with an antibacterial finish to prevent the growth of bacteria. - Excellent at absorbing and quickly drying sweat, protecting your head from the sun. - Flat seams provide a smooth texture and comfortable fit. - Recommended for wearing under a helmet. - One size fits all. - Features a Sweat Block seal. The size is a bit large, and I haven't been using it, so I'm selling it.