evo.com | Roark Button-Downs > The Roark Well Worn Thermal Shirt brings that perfect basecamp to backcountry energy with its cozy waffle knit blend of organic cotton and recycled polyester that breathes when you heat up and wicks when you sweat. With its pigment dyed, already broken in vibe and smart ribbed details, this thermal is built for layering up during those crisp morning adventures or cooler trail sessions. Flat-Back Waffle Knit and Durable Thermal Fabric 60% Organic Cotton / 40% Recycled Polyester | Roark Well Worn Thermal Shirt Men's 2025 - Large Gray | Cotton/Polyester