Are these warmer than synthetic base layers?

Yes, merino traps warmth well for its weight and stays warm when slightly damp. Synthetics dry faster but feel colder when wet.

No. Merino is fine and soft, and most owners report no itch against bare skin.

Can I wear them more than once before washing?

Yes. Merino resists odor, so many owners wear them several days on trips before washing.

Wash cold on a gentle cycle with wool-safe detergent and air dry. Heat and tumble drying can shrink or pill them.

Yes. The fit is slim enough to layer under jeans and work pants, though very tight pants may feel snug.

The Classic Thermal is Smartwool's 250-weight merino bottom, the warmest in its base layer line, suited to cold conditions rather than mild weather.

Rated 4.8 out of 5 from 557 ratings.

2 stores we checked sell it, including SkiEssentials, evo.

At SkiEssentials, for $125.00, as of our latest check.

$125.00at SkiEssentialsChecked Nov 10

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