Fox Main Ballast Mirror Goggle - Black/Blue . Ounce-for-ounce, the Main Ballast Mirrored Lens 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.
 
Best-in-class viewport for improved peripheral vision
Ability to install both standard and hard lenses
Non-slip silicone strap