Designed specifically for riding in sand conditions, the Main S Stray Goggles add closed-celled vent foam to filter out dust and debris. Ounce-for-ounce, the Main 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. All new view port design for unparalleled vision VLS (Variable Lens System) design allows you to upgrade standard lens to injection molded lens' in the same frame Closed cell vent foam blocks sand and debris from entering eye-port. Triple layer face foam with fleece liner. Clear Lexan lens offers UV protection Non-slip silicone strap with strap mounted third tear-off post 26470-329-OS