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SUNGAIT via Amazon [amazon.com] has SUNGAIT Ultra Lightweight Rectangular UV400 Polarized Sunglasses (3 Colors) on sale from $6.39 when you apply 50% off promo code G2G8VW5B at checkout and clip the corresponding coupon on the product page. Shipping is free w/ Prime or on $35+ orders.

Note: Amazon promo codes don’t always apply seamlessly. If you run into this issue, refresh the page, re-enter the code, or revisit the cart page.