— best merino wool base layers.

— with sculpted sides for enhanced fit, the smartwool base layer was designed specifically for women and delivers on every front.

It’s super comfortable and feels soft and.

Recommended for you

Women's classic thermal merino base layer crew.

Whether you're working up a sweat or simply looking to stay warm and comfortable, our women's classic thermal merino base layer bottom plus is up for the challenge.

Experience exceptional performance during your.

Top quality, great selection and expert advice you can.

Smartwool classic thermal merino base layer crew

While not the warmest.

With merino sport yarns and.

Smartwool classic thermal merino base layer crew

While not the warmest.

With merino sport yarns and.

Find a great deal on smartwool women's base layer tops.

Best women’s base layers at a glance.

Weight 218 g (top), 208 g (bottom) fabric 100% merino wool.

Stay cozy and comfortable with smartwool's women's base layer tops.

Shop for smartwool women's base layer tops on sale, discount and clearance at rei.

Combining the benefits of merino wool with the durability and fast dry times of polyester, the men's.

Top quality, great selection and expert advice you can.

Top quality, great selection and expert advice.

— smartwool women’s classic thermal merino base layer crew — straight, plus size, and bottom.

Weight 218 g (top), 208 g (bottom) fabric 100% merino wool.

Stay cozy and comfortable with smartwool's women's base layer tops.

Shop for smartwool women's base layer tops on sale, discount and clearance at rei.

Combining the benefits of merino wool with the durability and fast dry times of polyester, the men's.

Top quality, great selection and expert advice you can.

Top quality, great selection and expert advice.

— smartwool women’s classic thermal merino base layer crew — straight, plus size, and bottom.

Women's classic thermal merino base layer 1/4 zip plus.

Delivering exceptional performance and improved functionality, the women's smartwool classic thermal merino crew base layer top maintains your warmth and comfort as you hike, ski, bike.

New colors, new fit for improved style & functionality.

Seemed a bit heavy, maybe, but.

— if you're looking for a versatile synthetic base layer available for a price that doesn't break the bank, the rei midweight base layer crew is a great choice.

Top quality, great selection and expert advice.

Top quality, great selection and expert advice you can.

Top quality, great selection and expert advice.

— smartwool women’s classic thermal merino base layer crew — straight, plus size, and bottom.

Women's classic thermal merino base layer 1/4 zip plus.

Delivering exceptional performance and improved functionality, the women's smartwool classic thermal merino crew base layer top maintains your warmth and comfort as you hike, ski, bike.

New colors, new fit for improved style & functionality.

Seemed a bit heavy, maybe, but.

— if you're looking for a versatile synthetic base layer available for a price that doesn't break the bank, the rei midweight base layer crew is a great choice.

Top quality, great selection and expert advice.

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Delivering exceptional performance and improved functionality, the women's smartwool classic thermal merino crew base layer top maintains your warmth and comfort as you hike, ski, bike.

New colors, new fit for improved style & functionality.

Seemed a bit heavy, maybe, but.

— if you're looking for a versatile synthetic base layer available for a price that doesn't break the bank, the rei midweight base layer crew is a great choice.

Top quality, great selection and expert advice.