Breathes easier than a valve respirator. Patented wave design technology allows more airflow in and out for cool comfort. Unique waves double the filter area of comparable respirators. Exclusive Dura-Mesh® shell resists collapsing in heat and humidity and protects the filter media so it stays cleaner-looking longer. FlexFit® design expands and contracts as there is movement and speaking, for optimal comfort. Features pinch-free molded nosebridge with soft foam cushion and Softspun® lining. Meets heat and flame resistance in accordance with ANSI/ISEA 110-2003, Section 7.11.1. NIOSH Approved. Made in USA.