Women's Base Layers

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About Women’s Thermal & Base Layers

Underwear aside, discover our line of durable, warm, and odour-resistant thermal and base layers for the rest of your body. At Altitude Sports, you’ll find an extensive line of layering apparel perfect for any adventure.

In the Beginning

Outdoor apparel has come a long way since the beginning of human exploration. Today, more people than ever are heading into nature to make friends, get relief from everyday stress, and to improve their understanding of the world. And, so, with this increase in curiosity of the world outside our homes, came improvements to the tools we use to enhance our outdoor experience.
At Altitude Sports we know how important comfort is when you’re out in the backcountry or gliding down mountain slopes. That’s why we’ve put together an extensive line of thermal and base layers with varying temperature ratings... and fibres to ensure you get all you need to stay warm and dry in one place.

Stay Warm and Dry with Altitude Sports

Nothing ruins a good day more than getting cold and wet. That’s why we’re here to help you get the best thermal and base layers you need before heading out on your next adventure. Although both thermal and base layers can be used for added warmth to an outdoor outfit, it’s important to note the difference between the two.
Thermal layers are meant to provide added warmth. Base layers, on the other hand, were invented to reduce moisture retention while staying warm––this increases evaporation which in turn prevents chilly downtimes between periods of movement.
A layer rating is typically described as lightweight, mediumweight, and heavyweight. Each should be considered for moderately cool, cold, and below freezing temperatures respectively.
Merino wool has become a dominating fibre in the base layer category. It provides warmth when wet, has excellent moisture wicking properties, and is incredibly odour-resistant. If you’re looking for something highly durable, synthetic materials like polyester or nylon are the way to go. Never choose cotton or other heavy fabrics that retain water and provide little warmth.

We Got You Covered

Every choice is a good choice but women’s base layers do come in a plethora of styles and colours, materials, and temperature ratings to consider. Do you get a Burton Base Layer or a Crewneck Top? A pair of icebreaker leggings or Patagonia’s bottoms? Good thing we’ve got you covered. We accept returns within 30-days and shipping is free over $74 across Canada.

Frequently Asked Questions

Which base layer is the warmest?

Of all the materials out there, silk and merino wool make the warmest base layers. The only difference between the two is that silk has slightly better moisture wicking properties than merino wool. That said, you won’t find much of a difference when you’re out on the trail. Keep in mind that silk is less common and quite expensive. Although merino wool’s price follows close behind, it’s a lot easier to find.

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.

What temperature should you wear a base layer?

For moderate to cool temperatures––five to ten degrees––pick something lightweight like an Icebreaker shirt with a partial zipper or a pair of synthetic bottoms; cold temperatures––about five to zero degrees––call for a midweight layer like a Helly Hansen Lifa Crew; finally, if you’re heading out into cold temperatures that drop below freezing, opt for a heavyweight layer from Smartwool or Kari Traa.

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