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Smartwool Merino Wool Running Gear

Merino wool that regulates everything. Smartwool gear — base layers, long sleeves, socks and merino accessories — manages heat and moisture, resists odour and stays comfortable in all four seasons.

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Smartwool: Merino Wool Running Apparel and Accessories

Discover our selection of Smartwool merino wool apparel, designed to deliver thermoregulation, breathability, and comfort for your training in every season. Known worldwide for the quality of its merino wool, Smartwool offers high-performance base layers, merino running socks and technical pieces built for runners who train in cool and cold Canadian conditions.

Whether you’re looking for a men’s merino base layer, a women’s merino base layer, thermal tights, or an insulating mid-layer, the Smartwool collection helps you build an efficient, comfortable layering system.

Why Choose Smartwool Merino for Running?

Natural thermoregulation

Smartwool merino wool helps maintain a stable body temperature: it keeps you warm when it’s cold and remains breathable as intensity increases. This natural thermoregulation makes it an ideal choice for winter running and changing conditions.

Moisture management and odor resistance

Unlike standard synthetic fibers, merino wool absorbs moisture while staying comfortable against the skin. It dries efficiently and offers natural odor resistance—perfect for long runs and repeated training sessions.

Comfort, softness, and freedom of movement

Smartwool garments are designed with flat seams and stretchy fabrics to reduce chafing and provide a performance fit. The result: lasting comfort, mile after mile.

Most Popular Smartwool Base Layers

Smartwool Classic Thermal Merino

The Classic Thermal Merino line is ideal for colder temperatures. It’s an excellent merino thermal layer for winter training.

Smartwool Merino 250

Merino 250 offers the perfect balance of warmth and breathability. Versatile and reliable, it performs well in cold conditions while staying comfortable when effort ramps up.

Smartwool Intraknit

Intraknit technology combines targeted insulation with strategic ventilation—ideal for runners looking for a more technical performance piece.

Smartwool All-Season Merino

Lighter and versatile, All-Season Merino is a great baselayer for fall, spring, and cool days.

Smartwool by Product Type

Merino wool socks

Smartwool is a global benchmark for merino wool running socks: thermoregulation, moisture management and odour resistance to keep your feet dry and warm, from 5K to the ultra. Find them in our men’s running socks and women’s running socks.

Base layer tops and technical shirts

Explore our men’s long sleeves and women’s long sleeves to create a breathable, high-performance base.

Thermal tights and pants

To protect your legs in cold weather, discover our running pants and tights, as well as our selections of men’s running apparel and women’s running apparel.

Jackets and mid-layers

Pair your base layer with an insulating mid-layer or a men’s running jacket / women’s running jacket to complete your layering system.

Smartwool for Winter Running in Canada

Running in winter in Québec and across Canada requires the right gear. Smartwool merino wool is ideal for building a three-layer system:

  • Merino base layer to manage moisture
  • Mid-layer for insulation
  • Windproof shell or protective jacket for harsh conditions

Complete your setup with our running accessories and our full collections of men’s running apparel and women’s running apparel.

How to Choose Your Smartwool Base Layer

By temperature: choose All-Season for cool days, and Merino 250 or Thermal for colder temperatures.

By intensity: for higher-intensity training, prioritize more breathable options like Intraknit.

By season: fall and spring call for moderate insulation, while winter typically requires a warmer thermal layer.

By your layering system: make sure your base layer pairs well with your mid-layers and protective outerwear.

Smartwool at Boréal Running

At Boréal Running, we curate the best Smartwool merino wool running apparel to support your training in every season. Built for Canadian conditions, these technical pieces deliver comfort, performance, and durability. Explore the full collection and gear up to run efficiently in cool and cold weather.

Frequently asked questions

Is Smartwool merino wool too warm for running?
No. Merino naturally regulates temperature: it keeps you warm in the cold and stays breathable as effort rises. It also limits odour, a plus on long runs and repeated training.
Which Smartwool base layer should I choose?
All-Season for cool days and shoulder season, Merino 250 or Classic Thermal for the cold, Intraknit for intense efforts thanks to its targeted ventilation. The choice depends on temperature and intensity.
Does merino wool itch?
No. Smartwool's merino fibres are fine and soft, designed to be worn against the skin without irritation, with flat seams to limit chafing.
How do I care for merino apparel?
Wash in cold water with a gentle soap, without fabric softener, and dry flat. Merino needs washing less often than synthetics thanks to its natural odour resistance.