Introducing our HeatGuard Flannel Button-Down Smart Shirt, the ideal choice for colder weather. This water-repellent shirt serves as a cold weather alternative to our Poplin Smart Shirts. Crafted with Volcanic Viscose Yarn, it provides enhanced insulation for optimal warmth. The shirt is hardwearing and versatile, featuring a brush treatment on both sides for added softness and warmth. With an additional FIR coating, it offers advanced heat retention technology. Stay stylish, comfortable, and warm with our HeatGuard Flannel Button-Down Smart Shirt.