Men's Base Layers

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About Men’s Base Layers

Dress your best for cold weather whether you’re out on the slopes, trekking the Alps or simply walking the dog. Staying dry and comfortable this winter should be at the top of your list. Discover our selection of robust thermal and base layers at Altitude Sports.

Where to Start

Outdoor clothing technologies have become rather advanced over the years. Long underwear has been no exception. Since the earlier days of commonly found synthetic materials like nylon and polyester, outdoor brands across the globe are adopting natural and recycled fibres. The performance of these fabrics have surpassed what we previously thought was possible.
This evolution has changed not only the performance of these garments but also makes choosing the right layers more enjoyable. At Altitude Sports, we stock an extensive line of fantastic thermal and base layers for... any occasion from merino wool to recycled polyester.

Layering Up With Altitude Sports

The devil is in the details when it comes to choosing technical under-garments. Merino wool or a polyester/elastane mix? Zipper or no zipper? Is the Helly Hansen Lifa collection better or what about Patagonia’s Capilene technology? With so many options out there, we’re here to break down the nitty gritty.
Merino wool has a high warmth rating, moisture-wicking, and odor-resistant. Synthetic materials, on the other hand, are usually less expensive and long lasting. Never opt in for cotton or other heavy materials as they retain water and provide little warmth.
Zippered tops are great for ventilation when things get hot. In contrast, zipperless tops are lightweight and perfect for long adventures. Hoods work well for windy situations, backcountry treks, and cold bike rides. Well-made long underwear is a key player in your comfort outside. Select your next go-to layering system at Altitude Sports, you won’t be disappointed.

Worry-Free Shopping

Icebreaker makes a great short sleeve for men but maybe you’re eyeing a Smartwool, too. If you’re not sure which men’s base layer to choose, don’t worry about it. We know you’re looking for the right fit, colour, and warmth. We accept returns within 60-days and shipping is free over $49 across Canada.



Frequently Asked Questions


What temperature should you wear a base layer?

Choose a lightweight layer, such as the Fjällräven Bergtagen Thinwool or a pair of synthetic bottoms, for moderate to cool temperatures––about five to ten degrees; cold temperatures that range between five and zero degrees call for a midweight layer like a Burton Multipath Lifestyle Crew or Smartwool’s 1/4 Zip Baselayer; finally, if you’re heading out into below-freezing weather, opt for a heavyweight layer from SAXX.

Is a base layer the same as thermals?

Base layers and thermals are not the same thing but they can both be used for the same thing when both are not available to you. The difference lies in the design of both. While thermals keep your body warm, base layers are meant to keep your body dry.

Should a base layer be tight?

Base layer garments were invented to act as a “second skin”, providing some warmth but most importantly, to keep you dry. Therefore, when shopping for your next ensemble, choose base layers that are tight or snug.

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