Best-in-class viewport for improved peripheral vision Ability to install both standard and hard lenses Non-slip silicone strap The best value in riding goggles Ounce-for-ounce, the Main Core 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 functionality, they are a heavy hitter on the dirt while being light on the wallet. Offers a best-in-class view port for unparalleled vision Variable Lens System (VLS) design allows the transfer of standard and injection molded lenses in the same frame Triple-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 Clear Lexan lens