Ounce for ounce, the Main Goggles are the best value on the market. 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. VLS (Variable Lens System) design allows transfer of standard and injection molded lens' in the same frame. Triple-layer face foam with fleece liner provides superior sweat absorption. Lexan Lens offers excellent UV protection. Strap mounted third tear-off post. Non-slip silicone strap. Microfiber goggle bag included.