Columbia offers its Columbia Men's PFG Airgill Chill Zero Long Sleeve Shirt in four colors (Beacon pictured) for $64.98. Coupon code "AIRGILL20" drops it to $51.98. Plus, Greater Rewards members receive free shipping. (Not a member? It's free to sign up.) That's the lowest total price we could find by $19. It's available in sizes XS to XXL, although not in all size/color combinations.
Backcountry takes 50% off outlet items via coupon code "50BUMP". (Note that the 50% is taken off the full price, not the outlet price.) Shipping starts at $5.95, or spend over $50 to qualify for free shipping. Some exclusions apply. A couple of best bets, with prices after coupon: