Ni Hoo via Amazon offers the Tacloft Unisex Rectangle 57mm Polarized Clip-On Sunglasses in several colors (Grey pictured) for $11.99. Coupon code "OQONI5Q7" cuts that to $8.39. With free shipping for Prime members, that's tied with last month's mention at $4 off and the best price we could find. They feature a UV400 protection coating. Deal ends November 14.