Smartwool M’s 250 Thermal 1/4 Zip


We’ve updated the fit of our Men’s Classic Thermal Merino Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of our heaviest base layer tops and best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, shoulder panels, and a flatlock seam construction to help minimize chafing as well as help keep you comfortable and temperature-regulated as you enjoy high-intensity skiing, hiking, running, and more.

SKU: WP11889 Categories: , , ,


Our slim fit is intended to follow the contours of the body
100% Merino wool fabric made with an interlock knit for comfort, breathability, thermoregulation and odor resistance
Flatlock seam construction and offset shoulder and side seams designed to help increase comfort and minimize chafing
Side seams wrap to front
10″ (25 cm) center-front zipper with semi-locking slider
100% Merino Wool. Exclusive of Decoration.

Additional information


Black, Black Color Shift, Black Mountainscape, Charcoal, Deep Navy Color Shift, Military Olive, North Woods Heather, Rhythmic Red, Woodsmoke/Charcoal


Extra Large, Large, Medium, Small