Smartwool Classic Thermal Merino Base Layer Bottom
The Smartwool Classic Thermal Merino Base Layer Bottom is one of those pieces that makes a big difference in how comfortable you feel on the mountain. Made entirely from Merino wool, these bottoms provide dependable warmth without the bulk of heavier insulating layers, making them an excellent starting point for a cold-weather layering system.
The 250 g/m² interlock-knit fabric delivers substantial insulation while remaining breathable enough to handle changing activity levels. Merino wool naturally regulates temperature, manages moisture, and resists odors, helping you stay comfortable whether you're working hard on the mountain or sitting through a particularly cold chairlift ride.
The slim fit follows the contours of your body, allowing these to sit comfortably underneath ski or snowboard pants without bunching or adding unnecessary bulk. Flatlock seams help minimize rubbing and irritation, while the Merino-lined elastic waistband provides a soft, secure fit against your skin. A functional fly adds some everyday practicality.
If you're skiing in colder conditions, a quality base layer is one of the best investments you can make in your comfort. These provide the warmth you need without sacrificing breathability, and the natural versatility of Merino wool makes them just as useful for winter hikes, travel, and other cold-weather activities.
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Care Instructions
Shipping Information
We aim to dispatch all orders within 2 business days, and in most cases your order will be boxed and shipped within 24 hours. Rest assured, if you've received your order confirmation email, our team is working hard to get your order to you as quickly as possible. If you have any questions, please visit our FAQ page or contact our customer service team.
Orders will be shipped out of the nearest location to you with the item(s) ordered in stock.
For more information on estimated transit times and shipping costs click here.
Return Policy
All returns must be made within 90 days of your purchase date and must be in new condition (tags attached, unused, unwashed, and unworn).
We will provide a return label on items being returned with a purchase price of $250 or more, please contact us if your return meets this criteria.
To read our full return policy click here.