Sierra Trading Post offers the WearGuard Men's WearTuff Pique Polo Shirt in Royal Blue, Burgandy, or Black for $7.46. Coupon code SFB5715 cuts it to $5.59 and bags free shipping. That's the lowest total price we could find by $8. It's available in sizes S to XL XXL, although not in all size/color combinations. Coupon ends May 13.

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