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The Smartwool Classic Thermal Merino Base Layer 1/4 Zip Plus Top features some killer updates, including responsibly-sourced Merino wool and an improved fit that looks great on every body shape. The flatlock seams minimize chafing and the Merino wool is wicking, breathable, and odor-resistant, for maximum comfort no matter how hard you work.
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
8" Center Front Zipper with Semi-Locking Slider
Back Body Seam Wraps to Front of Body Enhancing Fit
Crew Neck with Raglan Sleeves
Flatlock Seam Construction Designed to Eliminate Chafing