[Schoolchild]
[Small]
[ordinary]
Filter cuts 99% of pollen and virus spray.
V-cut on both sides reduces gaps in the blinds, providing a snug fit for a long time.
Soft round ear straps are gentle on your ears, so your ears wont be painful. (Earstring: 0.2 inch (4 mm)
Double Ω pleats to keep the mouth space in your mouth for easy conversation.