Whether you're training for that trail 10K, doing yard work in the scorching heat, or out helping the kids with batting practice, the Columbia Men's Zero Rules II Shorts help to keep you cool, dry, and protected from the sun. Keeping your skin cool on hot, sticky days, the shorts' brief liner uses Omni Freeze Zero fabric for sweat activated cooling. This fabric lowers its temperature when it contacts moisture, giving off a cooling sensation as you push your limits or work tirelessly under the sweltering sun. In addition, these shorts features an antimicrobial treatment to combat funky odors after long hours of wear. A polyester ripstop outer provides durability and dries quickly, while pinhole mesh side vents promote airflow for enhanced comfort during the sweatiest of training sessions. A zippered pocket allows security for your keys or moolah for the ice cream man.