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The Smartwool Classic Thermal Merino Crew combines warmth and breathability in a classic crewneck design. Made from 100% merino wool with a thermal knit, this base layer efficiently regulates temperature while wicking moisture and resisting odors. Its snug fit and flatlock seams ensure comfort during all-day wear, whether layered for winter sports or worn on its own. Lightweight yet insulating, this crew is an essential piece for cold weather performance and everyday warmth.