Item: CAMBRIDGE MASKS 
Brand: CAMBRIDGE MASK Co(BRITAIN)
Made in: BRITAIN
Protection level: N99
Filtration efficiency: 99%
For people aged: whole family solution
Life span: 3-6months
Features and functions: 
● Military grade filtration technology is used in a fashion friendly mask suitable for the whole family;
● The textile used is also treated with silver, which gives it anti-bacterial and anti-viral properties;
● 3D integrated design makes it perfectly fit the human faces, while the valve makes it easy to breathe through.

How to choose your mask size? Please consult the guide below.