Fox Main Stray Spark googles – Black The Main Stray goggles, using the VLS ™ (Variable Lens System) variable lens system, undoubtedly offer the best value for money on the market. The VLS ™ system allows you to use both standard (supplied) and injection molded lenses (sold separately) with the same frame. Large viewing area, triple layer foam and tear off system: a perfect mix of performance and accessibility. This brand new model offers an unrivaled field of view for extraordinary vision. The Variable Lens System (VLS ™) allows you to use both standard and injection-molded lenses with the same frame. Face protection with triple layer of foam lined with fleece. Lexan ™ lens offering UV protection. Third fixing point of the tear off mounted on the band. Non-slip silicone band. Microfiber goggle case included. Spark Lexan ™ lens. Colour: Black.