The product line-up of NAROO MASK is quite easy to understand. It is made up of combinations of three elements:

1) Mask category: Z, F, N, X, E.

2) The thickness of the fabric: 1, 3, 5, 7, 9.

3) Type / length of the mask:

S for Short,

H for half-face,

F for full-face,

and the absence of the letter means the usual length of the mask that covers the neck.

For instance, Z5H means it is a model of Z (Advanced) category with a thickness of 5 points and Half-balaclava style