Features:
2 separate layers of material
Different color front and back to distinguish between inside and outside
Elastic Earbands
Filtration Pocket

Sizes:
XS: Young child fits average 3-6 yr old
S: fits children. I would say from ages 7-10/11 depending on face
M: Women fits most women and young adults
L: fits Men or plus size women
XL: plus size men or XXL Woman.