You may think you're cool, but are you actually cool? The Mountain Hardwear Men's CoolHiker T-Shirt is here to make you properly cool, so cool you might be considered chill. Cool.Q fabric not only wicks moisture and is stretchy, but it also cools while you sweat, so you stay super chill on the trail. An antimicrobial treatment keeps it stink-free after a long backpacking trip, while UPF sun protection provides some peace of mind after a long day in the sun.