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.

100% Merino Wool – Made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance.

Slim Fit

Updated Fit Improves Functionality and Better Accommodates a Range of Body Sizes

Crew Neck with Raglan Sleeves

Back Body Seam Wraps to Front of Body Enhancing Fit

Interlock Knit for Enhanced Comfort, Breathability, Thermoregulation, and Odor Resistance

Flatlock Seam Construction Designed to Eliminate Chafing