Smartwool Merino Wool Long Underwear

Stay warm and comfortable in our selection of merino wool long underwear. Crafted with high-quality materials, these base layers are designed to provide exceptional insulation and moisture-wicking properties. Whether you're braving the cold outdoors or lounging at home, our collection offers a range of styles and fits to suit your needs. From classic thermal bottoms to long sleeve tops, our merino wool long underwear is perfect for layering or wearing on its own. Experience the ultimate in warmth and comfort with our smartwool merino wool long underwear collection.