FOX Main Stray Spark Motocross Goggles Ounce-for-ounce, the Main Stray 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. Features: All-new design offers best-in-class viewport for unparalleled vision Variable Lens System™ (VLS) design allows transfer of standard and injection molded lens\\\' 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 Mirror Lexan™ lens