W's Classic Thermal Merino Base Layer Bottom 2026

100% Merino, 100% capable! Our Women's Classic Thermal Merino Base Layer Bottom is always ready for what's ahead. With an updated fit to improve functionality while enhancing aesthetics for a range of body shapes and flatlock seam construction designed to minimize chafing, comfort is never in question. Conquer the cold with confidence.

Features +

Slim Fit Design

Intended to follow the contours of your body for a sleek, comfortable fit.

100% Merino Wool

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

Mid-Rise Waist

Fitted with a mid-rise waist for optimal coverage and comfort. Size medium inseam: 30.5" (77.5 cm).

Flatlock Seam Construction

Designed to help increase comfort and minimize chafing during all-day wear.

Midweight 250g/m²

Perfect balance of warmth and breathability with moisture control and body temp regulation.

Temperature Rating +

Classic Thermal Rating

Warm (10°+)Cool (10° to -5°)Cold (<-5°) Materials +

Fabric Composition

100% Merino Wool (exclusive of decoration) for natural performance.

Merino Benefits

Natural moisture-wicking, temperature regulation, and odor resistance keep you comfortable all day.

Care +

Washing Instructions

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

Care Tips

Wash with like colors. Cool iron as needed. Do not iron decorations.

Sizing +

Size	Chest (in)	Waist (in)	High Hip (in)	Hip (in)	Inseam (in)	Arm Length (in)
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

For the best fit, measure yourself and refer to the size chart. If between sizes, we recommend sizing up for comfort.