evo.com | Smartwool Long Underwear Tops > Set yourself up with some of the best core warmth around with the Smartwool Classic Thermal Merino Base Layer Crew Top. This merino wool top stays warm, wicks moisture, and has natural odor-resistant properties so you can slide it on and get riding without thinking twice. Fit Updated to Improve Functionality for a Wide Range of Body Shapes Fabric Weight | Merino 250 This heavier, soft, 100% Merino wool fabric offers breathable warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. Slim Fit 100% Merino Wool Made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance. Flatlock Seam Construction Designed to Eliminate Chafing | Smartwool Classic Thermal Base Layer Crew Top Men's 2026 - Large Green