Designed specifically for mountain bikers, the MTB Main Goggles are designed to be worn with both full-face and 3/4 shell helmets. Ounce-for-ounce, they are the best value on the market, and feature our Variable Lens System (VLS). VLS makes your goggles compatible with both standard lenses (stock) and injection molded lenses (sold separately) within the same frame. With an expansive viewport, triple-layer foam, and tear-off functionality, they are a heavy hitter and light on the wallet.MTB-specific eyewear solution, designed to be worn with traditional full-face and 3/4 shell helmetsAll-new design offers best-in-class viewport for unparalleled visionVariable Lens System (VLS) design allows the transfer of standard and injection molded lenses in the same frameTriple-layer face foam with fleece linerLexan lens offers UV protection