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Named "Best Overall Base Layers for Women" by GearJunkie (2025-2026), the Smartwool Women’s Classic Thermal Merino Base Layer Crew is a fan favorite reimagined. Crafted from 100% Merino wool, this updated version features new color options and an enhanced fit for improved functionality and aesthetics. Shoulder panels and flatlock seam construction help prevent chafing, while the slim fit ensures comfort and performance. Add this cold-weather essential to your wardrobe for skiing, hiking, climbing, biking, or everyday winter adventures.
Because you want warmth, comfort, and performance in cold conditions. The Smartwool Women’s Classic Thermal Merino Base Layer Crew combines the natural benefits of Merino wool with a slim fit, flatlock seams, and breathable midweight fabric—making it the perfect choice for skiing, hiking, climbing, biking, and everyday winter wear.


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