More than just a t-shirt, the Columbia Zero Rules Short Sleeve T-Shirt is a great option to have on those hot and humid days when you wish you could pour a bucket of cold water over your head. Whether you're on a hike, a walk or playing in the park with the kids, this Zero Rules T-Shirt will help keep you cool and dry as the temperatures rise. Who knew technology could be so great in a T. The Omni-Freeze ZERO Sweat-Activated super cooling is an awesome technology that is activated when you sweat and works by cooling the temperature of the material. This provides an instant and prolonged cooling as well as accelerates the wicking process. Omni-Wick will help pull the moisture away from your skin to add to your comfort level and antimicrobial will keep the odor-causing bacteria at bay. As you're enjoying your day under the sun, you'll have UV protection by wearing this shirt. In fact, the 30 UPF rating will help block the sun from burning up your skin. So, when you're heading out for a day outdoors, make sure to look good, stay comfortable and feel amazing with the help of this Columbia Zero Rules Short Sleeve T-Shirt.