OMNI-FREEZE ZERO: Blue rings react with sweat to lower the temperature of the fabric so you feel cooler, while it wicks away moisture OMNI-WICK: The ultimate moisture management technology for the outdoors; Omni-Wick quickly moves moisture from the skin into the fabric where it spreads across the surface to quickly evaporate—keeping you cool and your clothing dry OMNI-SHADE: Be safe and protected; Omni-Shade blocks UVA and UVB rays to help prevent sunburns and long-term skin damage; The tight weave construction with UV absorbent yarns block the full spectrum of harmful UV rays BUILT TO LAST: Columbia’s attention to detail is what sets our apparel apart from others; We use only the highest quality materials, expert craftsmanship, and durable stitching; This is a long-lasting shirt you're sure to enjoy for seasons to come