The Opti-Fit is designed for superior fit comfort and optics in a full face respirator. This unit is constructed to include a durable silicone skirt to enhance the wearer's comfort. The new state-of-the art lens is replaceable and offers an exceptional view. It also includes an anti-scratch coating to help prevent obscuring scratches. Includes a nose cup to help prevent fogging. Compatible with S-Series and T-Series filter cartridges. NIOSH approved. Replacement parts and cartridges available.