evo.com | Smartwool Long Underwear Tops > Whether you run hot or cold, the Smartwool Classic Thermal Merino Base Layer Plus Top is the next to skin layer you want when the temps drop. Merino wool is thermoregulating and reduces odors, and the new improved fit reduces chafing and looks great on a wider variety of body shapes and sizes. Updated Fit Improves Functionality and Better Accommodates a Range of Body Sizes Slim Fit 100% Merino Wool Made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance. Back Body Seam Wraps to Front of Body Enhancing Fit Crew Neck with Raglan Sleeves | Women's Smartwool Classic Thermal Base Layer Plus Top 2025 - X-Large Purple