Crews Clear Over The Glass Anti Fog Unit PK. The anti-fog inserts provide added optical clarity by transmitting a clear optical image to the eye that reduces or eliminates glare from the Glasses. The anti-fog inserts also reduce or eliminate steamed up eyelets that allow fogging or fumbling when wearing Glasses with a lab hood or respirator. Ordering Information: All goggle straps are color coded. The color coding system starts with the frame and ends with the inserts. Once you receive your woven goggle strap tear off the backing and label the straps to the Clear Over the Glass goggle. Once you receive your woven in strap tie down the goggle securely in place. Once the straps are adjusted OTG goggles can be worn in the vertical or horizontal position. They can also be worn with most prescription glasses. See inserts. Specifications for Crews Clear Over The Glass Anti Fog 135-OG110AF: Manufacturer: Crews Frame Color: Silver Available quantity options: Pack Fabric/Material: Polycarbonate Nylon Package Contents: Crews Clear Over The Glass Anti Fog 135-OG110AF / 300051-958 The Crews Clear Over The Glass Anti Fog 135-OG110AF is a quality addition to the Crews lineup. For more great deals on Workwear Uniforms by Crews please browse our Crews Safety Glasses page. Crews Clear Over The Glass Anti Fog 135-OG110AF Unit PK