The sidewinder glides through harsh desert landscapes with astonishing fluidity and grace. Sure it’s a snake, but a snake so flexible we designed our Sidewinder Shirt to give you that same kind of agility and ease. You’ll move effortlessly all day thanks to 4-way flexible DuluthFlex® fabric and freeing Underarm Gussets. And like its namesake, this shirt is built for searing climates: super-light, 3.4-oz. wicking performance fabric sports UPF 30 sun protection – plus it wicks sweat to keep you cool! There’s even breathable mesh under the back cape. So pull on a Sidewinder and don’t let summer heat or binding shirts get you rattled.