evo.com | Flylow Button-Downs > The Flylow Handlebar Tech Flannel is a temperature regulating midlayer in disguise with performance capabilities hiding beneath that classic mountain man aesthetic. This clever chameleon features quick-drying, temperature-regulating polyester construction. Whether you're layering it under your shell or rocking it solo, this versatile flannel proves that sometimes the best high-tech gear comes disguised as your favorite vintage shirt. Work Shirt Fit and Styling Snap-Up Center Front, Chest Pockets and Cuffs 100% Polyester Flannel Duraflex Snap Buttons | Flylow Handlebar Tech Men's 2025 - Medium Blue | Polyester