The best value in motocross and mountain bike goggles Ounce-for-ounce, the Main Peril 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 for unparalleled peripheral vision Variable Lens System (VLS) allows transfer of standard and injection molded lens 3-layer face foam with fleece liner Strap mounted third tear-off post Non-slip silicone strap Microfiber goggle bag included Lexan™ lens offers UV protection Mirror Lexan™ lens