Check the listing for details. Oakley Reusable Msk3 Anti-fog Face Mask. Condition: New with tags. Listed at 54.69 USD. Designed with seal, filtration, fit and eyewear integration in mind, the Oakley MSK3 Mask is designed to work seamlessly with eyewear and fit snugly on the wearer's face. An aluminum bar embedded in silicone gasket adjusts for a perfect fit that accommodates your glasses, while the flexible silicone mask fits seamlessly with eyewear.