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The BLOC Mask MK12 Goggles are designed to fit medium to large-sized faces. Featuring clever new ‘Click3’ nose adjustment technology, they allow for a more tailored fit. To prevent fogging there are vents and the anti-fog double lens features anti-fog coating. An exceptional field of clear vision is assured with these helmet-compatible goggles, which have a dual adjustment strap and tri layer moisture wicking insulated fleece to ensure comfort for your face