Men's Columbia Zero Rules™ Light SS Graphic Crew Cooling Shirt A graphic tee that wicks sweat and keeps you cool, perfect for summer hikes. STAY COOL Defeat the heat in this graphic crewneck tee, featuring a sweat-activated cooling system that will keep you cool when the temperature rises. SUMMER FRESHNESS Sweat-wicking fabric and side panels pull moisture away from your skin, keeping you fresh even on tough days. Men's Columbia Zero Rules™ Light SS Graphic Crew Cooling Shirt - Benefits: Omni-Freeze™ Zero, a super-cooling system activated by sweat Omni-Wick™ Omni-Wick™ side panels. Applications: Hiking, Speed ​​Hiking, Water Omni-Shade® – Sun Protection Omni-Shade sun protection technology helps protect your skin from harmful UV rays, so you can spend more carefree hours in the sun. Omni-Freeze® – Advanced Cooling Our heat transfer technology allows heat to be transferred away from your body, providing significant cooling on hot days, so you can stay outside longer. Omni-Wick® –  is a new technology that wicks moisture away from your body. Products with Omni-Wick ® are excellent at absorbing moisture and sweat, then quickly transporting it away from your skin, where it quickly evaporates. This process ensures that the wearer always has cool, dry clothing.