Ounce-for-ounce, the Main Stray Goggles are the best value on the market, and feature Fox's 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.