The Sovereign sunglasses by Anarchy feature a 6 base lens, high grade nickel silver alloy frame material, and 3 barrel metal stop hinges. As with all Anarchy lenses, they offer 100% UV protection. Product ID# 2064120.
What is an 6-Base lens? A lens' Base refers to the amount of arc in the lens and therefore the arc in the frame. A 6-Base is a more flat, square shape creating a more scholarly look. A larger base like a 9-Base is more wrapped and therefore will appear more suited for active endeavors.