W's Classic Thermal Merino Base Layer Crew 2026

Meet the new and improved Women's Classic Thermal Merino Base Layer Crew. We've updated this 100% Merino wool fan favorite with new color options and an enhanced fit to improve functionality while elevating aesthetics. The addition of shoulder panels and its flatlock seam construction help prevent chafing and increase your comfort level. 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.

Merino Wool

Fabric helps combine the moisture management, temperature regulation, and odor resistance of 100% Merino wool with interlock knit for comfort.

Raglan Sleeves

Raglan sleeve construction for enhanced mobility and comfort.

Flatlock Seam

Flatlock seam construction designed to help increase comfort and minimize chafing.

Midweight 250g/m²

Moisture control, odor resistance, body temp regulation.

Materials +

Fabric Composition

100% Merino Wool. Exclusive of Decoration.

Care Instructions

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

Temperature Rating + Classic Thermal Warm (10°+)Cool (10° to -5°)Cold (<-5°) 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