Duluth Trading Co. discounts a selection of its men's polo shirts, as listed below. Shipping adds $6.95. The deals (select "clearance colors" to see these prices if needed): Duluth Trading Co. Men's No Polo Short Sleeve Shirt with Pocket for $17.99 ($12 off) Duluth Trading Co. Men's No Polo Short Sleeve Shirt for $17.99 ($12 off) Duluth Trading Co.