Crafted with advanced 3D layered fabric technology, this mask is exceptionally breathable, allowing children to breathe easily while staying fog-free. It's designed for various outdoor activities, including cycling and running, offering UPF 50 sun protection and shielding children from wind and dust. ( Due to its breathable design, the sun protection value of the mask's breathable parts may vary) The adjustable ear loops ensure a secure and customized fit, ensures you no longer have to worry about the mask being too big or too small.