Rocknight via Amazon offers its Rocknight Men's Driving Polarized Sunglasses in Gun Grey Frame/Grey Lens for $21.98. Clip the 5% coupon on the product page and apply coupon code "VV5YU92Y" to cut the price to $12.31. With free shipping for Prime members, that's tied with our March mention, $10 off, and the lowest price we could find. They offer 100% UV protection.