With a fairly flexible material easily adapts to the face for perfect tightness. The material does not cause sweating or effect "wet" when the port lasts long. Breathing easier thanks to the ad hoc valve. Effective for fine dust as sanding for paint mist (high and low pressure spray guns). Life according to the manual: 3 years, but the clogging of filters pouura shorter. Little accumulation of static electricity, and therefore does not cover "naturally" dust. Do not forget to add sunglasses to protect you and keep the mask in his bag zipped (mind opening the bag sealed happens), protected from light. At that price, there is no reason to play with his health ...
