Classic Thermal Merino Base Layer Bottom 2026

We've updated our Men's Classic Thermal Merino Base Layer Bottom to bring you a better fitting, more functional tight. The technical benefits of 100% Merino wool will help you keep your game at a high level for longer. And our warmest-weight wool fabric will help keep you warm and comfortable as you ski, run, and hike the day away.

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.

Inseam Length

Fitted with a mid-rise waist. Size medium inseam: 30" (76 cm).

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