Columbia offers its Columbia Men's Vent Cush Flip Flop Sandals in Black for $30. Coupon code "COLMAY60" drops the price to $12. Plus, Greater Rewards members receive free shipping. (Not a member? It's free to sign up.) That's $18 off list, $3 under our mention from last month, and the lowest price we've seen. They're available in sizes 9 to 13.