The best value in motocross and mountain bike goggles Ounce-for-ounce, the Main Interfere Smoke Goggles 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 lens functionality, they are a heavy hitter and light on the wallet. Best-in-class viewport Variable Lens System (VLS) 3-layer face foam with fleece liner Lexan™ lens offers UV protection Non-slip silicone strap All-new design offers best-in-class viewport for unparalleled vision Variable Lens System (VLS) design allows the transfer of standard and injection molded lenses in the same frame 3-layer face foam with fleece liner Lexan™ lens offers UV protection Strap mounted third tear-off post Non-slip silicone strap Microfiber goggle bag included