The Magabi protective mask is very soft and silky made with a hypoallergenic fabric produced in Poland with an extremely dense weave. it is shaped and adheres well to the face both on the nose and laterally and under the chin. it closes with two knot cords and has 99.9% filtering capacity both in and out for anything larger than 0.1 microns. it is machine washable up to 95 degrees (do not iron) and is available in 2 sizes S for children and L for adults. (in the photos you will find the measurements. the S is also suitable for women with a not too large face). internally on the nose there is a slot in which to insert a rigid core (not included) to shape it even better and make it more adherent. if used continuously it would be good practice to change it every 4 hours because the vapors of the breath, moistening it, make it a breeding ground for the germs and bacteria expelled from the body.