Disposable Respirator, 4600 Series, N95, Medium/Large. Exclusive easy-breathing wave design. Unique waves double the filter surface area of our comparable respirator. Dura-Mesh® shell provides bi-directional protection from dirt on the outside and moisture on the inside. Soft, cloth SmartStrap® is both HANGABLE and ADJUSTABLE. FlexFit® design expands and contracts as you move and speak, for optimal comfort. Ideal where unvalved respirators are preferred. Less cost than valved respirators. Longer wear means less cost. Softspun® lining for increased comfort and durability. Soft foam nose cushion and contour shaped for comfort. Pinch free nose bridge. Meets heat and flame resistance in accordance with ANSI/ISEA 110-2003 Section 7.11.1. 100% PVC-Free®.