Easier breathing and cool comfort are what you get when you wear an AirWave[R] respirator. The larger surface area of the wave design means more air flows in and out of the mask, all without a valve! Easy breathing by design. Outer Dura-Mesh[R] keeps respirator clean looking. Inner Dura-Mesh[R] prevents collapsing from heat and humidity. Softspun[R] lining is comfortable against the face. The unique FlexFit[R] design moves with your mouth for comfort all day long. Classic 2 strap. Pinch free nose bridge. Metal free.