Start cool with lightweight sun protection that's instantly cool to the touch with the Mountain Hardwear Sun Drift Cooling Long Sleeve Shirt. This button-up shirt features Broad Spectrum UPF 50 protection that filters out harsh UVA and UVB rays. Made from polyester, it is styled with long sleeves, buttoned cuffs, 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. This long-sleeve shirt features HeiQ Cool technology, which is a bio-based finish that's cool to the touch to enhance thermal comfort. Regular fit. Two buttoned chest pockets. 100% polyester. Machine washable.