Brooks Mock Long Sleeve features Equilibrium technology for the ultimate in moisture management. 100% polyester fabric moves moisture away from your skin to keep you dry and balances body temperature for supreme comfort. Invisible zippered pocket at the hip carries your key, ID or your MP3 player. Classic lines add to the charm of this mock contributing to just one of the reasons you'll reach for this one time and time again. Colors include your choice of Black, Cool or Glo. Machine wash. Imported. Your choice of sizes S-XL.