Classic Thermal Merino Base Layer Crew 2026

Meet the better-than-ever Men's Classic Thermal Merino Base Layer Crew. We've updated this 100% Merino wool fan favorite with new colors and a new fit to improve functionality while enhancing aesthetics. Shoulder panels eliminate top shoulder seams, and a flatlock seam construction helps prevent chafing. Add one of our best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.

Features +

Slim Fit

Our slim fit is intended to follow the contours of the body for a streamlined feel.

100% Merino Wool

Fabric combines moisture management, temperature regulation, and odor resistance with interlock knit for comfort.

Raglan Sleeves

Shoulder panels eliminate top shoulder seams for enhanced comfort.

Flatlock Seam Construction

Designed to help increase comfort and minimize chafing.

Midweight 250g/m²

Provides moisture control, odor resistance, and body temperature regulation.

Care Instructions

Machine wash warm gentle cycle with like colors. Tumble dry low. Do not bleach or dry clean.

Materials +

Fabric

100% Merino Wool. Exclusive of Decoration.

Weight

Midweight 250g/m² for optimal warmth and breathability.

Temperature Rating +

Temp Rating: Classic Thermal

• Warm10° +
• Cool10° to -5°
• Cold<-5°

Size Chart +

All measurements are in inches.

Size	Chest	Waist	High Hip	Hip	Inseam	Arm Length
XS	32-33	24-25	31-32	35-36	29-30	27-28
S	34-35	26-27	33-34	37-38	30-31	28-29
M	36-38	28-30	35-36	39-40	31-32	29-30
L	39-40	31-34	37-39	41-43	32-33	30-31
XL	41-44	35-38	40-43	44-47	33-34	31-32