Start cool with lightweight sun protection that's instantly cool to the touch, wearing the Mountain Hardwear™ Sun Drift™ Cooling Short Sleeve Shirt. Its HeiQ Cool technology is a bio-based finish that's cool to the touch to enhance thermal comfort. This button-up shirt is designed with Broad Spectrum UPF 50 protection that filters out harsh UVA and UVB rays. It is styled with short sleeves, a pop sun collar, and a straight hem. The HeiQ Mint odor-removing technology of the shirt is a plant-derived deodorizer that regenerates after every wash.