Duduma via Amazon offers its Duduma Unisex Polarized Sport Sunglasses
in 7 styles (Black/Black pictured), model no. TR58, for $14.99. Coupon code "T73VPGNK" cuts them to $9.89
. Plus, Prime members receive free shipping
. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $5.48.) That's $20 off and the lowest total price we could find. They feature 100% UVA and UVB protection, shatterproof lenses, and a super-light frame.