Duduma Sunglasses via Amazon offers the Duduma Unisex Polarized Sports Sunglasses in ten colors (White/Blue pictured) for $21.99. Coupon code "F7VRNJ2V" cuts them to $11.99. 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 the lowest total price we could find by $14. They feature 100% UV400 protection.