REI Midweight Polartec Power Dry Men’s Shirt for $30.93. Select in-store pickup at REI to save on shipping. Otherwise shipping is $5.99 for a total of $36.92 shipped, or free for orders over $50. If needed, use this Filler Tool to qualify for free shipping. Here is a screenshot for your reference. The shirt has flatseam construction, underarm and side gussets, and center front zipper.