The Comfort-Air Series 100 Half Mask Respirator, MADE IN AMERICA, is packed with features! This reusable respirator has a deep chin cup to allow for a secure, universal fit; features an extra large inhalation valve which contributes to easier breathing; and is equipped with swivel retainers to allow a natural fit without pressure points and strap tangles. Enjoy a unique corrugated exhalation valve diaphragm, available only on US Safety's half mask, which allows the maximum amount of hot, humid air to be exhaled from the mask quickly. Uses US Safety's replacement components and filter cartridges. Available in sizes small, medium, and large.