Back when Oakley was making the women's Endure models, I scored a couple vr28 BI polarized lenses for cheap. I also had a set of Zero arms and a Zero nosepiece. Late one night I broke out the dremel and made these. They work a little better than an original zero because the lens is stiffer. It grips tighter on the head, and the lens doesn't flex as much so the tips of the earstems aren't sticking out at your temples. I'm pretty sure you can do this with any shield lenses; I picked the Endure because of the nice profile. edit - this is actually vr28 polarized. vr28 bi is the other lens.