The Mountain Hardwear Sun Drift™ Cooling Short Sleeve Shirt uses lab-tested fabric technology that actually lowers your skin temperature before you even start sweating, giving you a tangible coolness you can feel the moment you put it on. Hidden vents above the chest pockets and a mesh-lined back panel keep air moving, while UPF protection and wrinkle-resistance mean you stay cool, protected, and presentable from trail to town. Performance that doesn't look like performance, which is exactly the point.