1-Should be disposable.
2-Should be able to completely protect the face.
3-Should be easy-to-use for persons using glasses.
4-Should be composed of two separate sections; forehead band and shielding.
5-The forehead band should be adjustable for all users with the help of velcro tape.
6-The shielding should be polycarbonate and should not tire the eyes of the person.
7-The shielding should not be affected from the breathe and steam up.
8-The shielding should be attached to the forehead band with a special rubber button
and can be adjusted to the desired position.
9-Both surfaces of the shielding should be covered with protective film
which could be removed before usage.