Lightweight Wicking Fabric Built from lightweight wicking fabric to keep you cool and comfortable. Mesh Ventilation Keep your head cool and protected with our mesh ventilation. Tech Sweat Liner Generous sweat band to pull moisture away from your head leaving you cool and ready for whats around the next bend. Adjustable Sizing Pick your size, then fine-tune the fit with our external size adjuster. UPF 50+ Sun Protection It's hard to beat the enjoyment of a day in the sun, unless it's a day spent in the shady pleasantness of a UPF 50+ hat. A rating of UPF 50+ is the highest sun protective rating achievable and means only 1/50th or less of UV rays are able to pass through, allowing you to diminish the sun, not the fun!