BXT Elastic Breathable Sun-resistant Windproof Polyester Cycling Mask Reflective Balaclavas Material:Soft and Breathable polyester Absorbent and dry very quickly, keep you cool in hot weather Protect face and neck from ultraviolet?ray, wind, and dust Very elastic, fit for different size heads Only fluorescence one will noctilucent in the dark, others are able to reflect the light at night, which is very cool and fashion