The Active Mask is designed with an earloop which has an adjustable clasp and hair grip rubber to remove ear fatigue. The mask is 2-ply for outdoor high intensive exercises. A disposable PM 2.5 filter included (fits into the mask's built-in filter clip, which cups around the nose and mouth for easier breathing).
 
Inclusion:
x1 COOCOO Active Mask
x1 PM 2.5 filter