100% Speedlab (51000-008-02) Barstow Replacement Lens-Silver Mirror, Free Size The Cylindrical shape of the dalloz lens shifts visual distortions to the periphery creating flawless clarity and excellent peripheral vision without any blurred zones The durable lens works in Union with the minimal frame design of the Barstow to offer superior visibility in any conditions Neutral tint reduces glare and increases Color perception in Medium to bright light