Fox Main Youth Goggles 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 design offers best-in-class view port for unparalleled vision VLS (Variable Lens System) design allows transfer of standard and injection molded lens' in the same frame. Triple layer face foam with fleece liner. Lexan lens offers excellent UV protection. Strap mounted third tear-off post. Non-slip silicone strap. Microfiber goggle bag included. Mirror Lexan lens.