The Patagonia Men's Airchaser Shirt is a light and fast, moisture-wicking, technical trail running top with Capilene® Cool Lightweight fabric in front and breathable mesh in back for high-output activities. Run-specific details include set-in sleeves with underarm gussets, strategically taped seams that stay clear of a pack or vest, a locker loop for easy hang drying and a tagless, no-itch neck. The Airchaser has a reflective logo on the left chest and center-back neck, is Fair Trade Certified™ and has HeiQ® Fresh durable odor control so you don't chase away your friends.