Run like the wind—Patagonia's new Airchaser is dialed and light. The polyester (37%–100% recycled) double-knit fabric, with recycled polyester mesh panels in the shoulders and back, wicks in a flash, enhances ventilation and helps keep you cool even on hot summer days. 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 Polygiene® permanent odor control so you don’t chase away your friends.  Features and Specifications Set-in sleeve construction with underarm gussets for chafe-free comfort and full range of motion Strategically taped seams for reduced chafing when worn with a pack or vest Contrast mesh shoulder and back body panels allow for ventilation and breathability Easy-hang locker loop for air drying; HeiQ® Fresh durable odor control Tagless neck for itch-free comfort Reflective logo on left chest and center-back neck Fair Trade Certified™ sewn 88 g (3.1 oz) Materials:Heathers: 2.7-oz 100% polyester (37% recycled) double knit.Stripes: 2.3-oz 100% polyester (83% recycled) double knit.Panels: 2.6-oz 100% recycled polyester mesh.All with miDori™ bioSoft for added wicking and softness, and HeiQ® Fresh durable odor control. Fair Trade Certified™ sewn Patagonia Men's Airchaser Short-Sleeved Running T-Shirt