2.5" (6.5cm) crushable brim with UPF 50+ sun rating and 100% recycled mesh and ripstop main body fabric Wicking sweatband/underbrim for maximum evaporation and bluesign certified main body fabric, mesh, and sweatband Ultra lightweight VaporLite fabric with reflective details Ponytail-friendly and Sunglass Lock keeps glasses in place Stretch comfort adjustable sizing and crushable design is travel friendly