The Columbia Freezer III Dress keeps us comfortable while we hit the town. The polyester blend fabric is perfect to wear on lazy summer afternoons, and the Omni-Shade UPF 50 rating gives a layer of protection in case we decide to stop by an open-air market for lunch. The Omni-Freeze treatment not only feels cooler to the touch than most fabrics, but it helps us stay cool in hot weather, too.