Best thermal underwear sets on Amazon.ca for winter

By the Amazon Picks Desk, Canada News Media. We research products from real Amazon.ca listings and customer reviews; we have not tested them ourselves.

Disclosure: As an Amazon Associate, we may earn a commission from qualifying purchases made through this link.

Cold snaps are already here across much of the country, and a base layer is the cheapest way to stay warmer on a walk to the bus stop, a shift outdoors or a day on the hill. Amazon.ca has hundreds of thermal underwear sets. We looked at five men’s sets that show strong ratings and large review counts on their listings, from fleece-lined polyester sets near $30 to a merino wool set above $125. Prices and ratings below were shown on Amazon.ca on Oct. 28, 2026, and may change.

Quick comparison

Runhit fleece-lined thermal set

This is the set most Canadians are buying right now: the listing carries Amazon’s Bestseller badge and shows 300+ bought in the past month. It is aimed at shoppers who want warm, cheap long johns for daily wear under jeans or work pants.

• Price: $29.99 on Oct. 28
• Rating: 4.4 out of 5 from 2,316 ratings
• Listed as a fleece-lined top and pants set for cold weather
• Listing notes recycled materials

Best for: everyday winter wear on a budget. Check the size chart before ordering, because fit is the most common question on sets like this.

See the current price on Amazon.ca

Roadbox fleece-lined compression set

Roadbox sells a close-fitting compression-style set with a fleece lining. It is the cheapest option here and shows 200+ bought in the past month, though it has far fewer reviews than the others.

• Price: $29.99 on Oct. 28
• Rating: 4.4 out of 5 from 631 ratings
• Listed as fleece-lined compression long johns
• Listing notes recycled materials

Best for: anyone who wants a snug layer under a jacket or ski pants. A compression fit runs close to the body, so people between sizes should read the size guidance carefully.

See the current price on Amazon.ca

romision thermal underwear set

With more than 8,000 ratings, this is the most-reviewed set in our group. The listing is marketed for hunting and cold-weather outdoor use, and it shows 100+ bought in the past month.

• Price: $32.99 on Oct. 28
• Rating: 4.4 out of 5 from 8,041 ratings
• Listed as a long johns base layer set, top and bottom

Best for: outdoor work, hunting and ice fishing, where a large pool of buyers gives a steadier picture of how the set holds up.

See the current price on Amazon.ca

CL convallaria long johns set

This set has the best rating of the budget picks, 4.5 stars across about 4,000 ratings, and also shows 100+ bought in the past month. It is sold as a warm base layer for cold weather.

• Price: $32.99 on Oct. 28 (one search view showed $33.99)
• Rating: 4.5 out of 5 from 4,020 ratings
• Listed as a thermal underwear set for cold weather

Best for: shoppers who want the highest-rated low-cost set. The price moved by a dollar between views, so check the listing before you buy.

See the current price on Amazon.ca

Danish Endurance merino wool base layer set

This is the premium pick. Merino wool is a natural fibre that outdoor shoppers often choose because it tends to stay warm and resist odour, and this set is priced accordingly. The listing showed a limited-time markdown from a higher list price and a Safer chemicals label.

• Price: $127.46 on Oct. 28, marked down from $144.95 to $149.95 depending on the option
• Rating: 4.5 out of 5 from 1,729 ratings
• Listed as a merino wool top and bottom set for men

Best for: long days outdoors, such as skiing or winter hiking, and for anyone who finds synthetic fabrics clammy. It costs about four times as much as the budget sets.

See the current price on Amazon.ca

How to pick a base layer

A base layer works best when it sits close to the skin and is topped by a mid layer and a windproof shell. Cotton holds sweat and can leave you colder, so check the fabric on the listing. For a quiet day in town, a fleece-lined set is usually enough. For skiing, snowshoeing or other hard effort, look for a thinner moisture-wicking or merino set that will not overheat you. Pair it with warm feet and hands: see our guides to merino wool socks and touchscreen winter gloves.

How we chose

We searched Amazon.ca for men’s thermal base layer sets and kept five listings with ratings of 4.4 or higher and at least 600 ratings. We recorded prices, ratings and review counts from the listings and did not test the products. Written review text was not readable on the listings, so we do not summarize complaints; read the recent reviews and size chart before you buy. Several of these sets are sold by third-party sellers. Prices may change.

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