Breathes easier than a valve respirator. Exclusive wave design for less resistance and better breathability. Breathes like it has a valve, but without one. SmartStrap is adjustable, metal-free and hangable. Dura-Mesh® shell resists collapsing in heat and humidity. FlexFit® design expands and contracts for optimal comfort. Features pinch-free nosebridge, Softspun® lining and soft, foam nose cushion. Longer wear means less cost. Made in USA.