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These base layers will keep you warm in any climate.

Travel + Leisure

As an Australian, I embrace hot weather and thrive in the heat.

A collage of a thermal pants, shirt and full set on a grid background

Credit:Travel + Leisure

Thankfully, I hardly feel the cold thanks to my trusty thermal underwear.

The Helly Hansen Lifa Active Pants are just what you need for a cozy nights sleep.

Thanks to their two-layer construction, youll stay comfortably warm without getting too hot.

BALEAF Thermal Shirt

Amazon

While it also has infrared reflection properties, I mainly enjoy it as my comfy weekend loungewear.

I love the colorful designs, but what really impresses me is the soft, quick-drying fabric.

And the best part?

Helly-Hansen Womens HH LIFA Baselayer Pant

Amazon

It helps avoid any chafing.

The fleece-lined thermals offer great insulation and help trap body heat, ensuring you stay warm and cozy.

Shoppers rave about this set because its ultra-soft and doesnt pill or shrink after washing.

Free Country Microtech Heat Cocaber Base Layer Bottoms

REI

[I] gave this base layer a go underneath my snowboarding outfit, wroteone reviewer.

It was breathable, comfortable, and regulated my body temperature down the slopes.

Merino wool is naturally heat-regulating, breathable, and wrinkle- and UV-resistant.

Kari Traa Fryd Pant

Backcountry

Plus, the fabric has a natural elasticity, allowing for plenty of movement no matter what youre doing.

While it may feel snug for some, it offers exceptional warmth and comfort as a base layer.

Its a great midweight layer that pairs well with a larger coat.

SIMIYA Thermal Underwear Set

Amazon

Rocky Womens Thermal Underwear Set

This thermal underwear is perfect for relaxing at home.

Its made from a soft poly-spandex that feels great against the skin.

If you venture outside, it provides moisture-wicking properties while keeping you warm and cozy.

HEROBIKER Thermal Underwear

Amazon

Youll also love the wide range of patterns and colors available, including solids, stripes, and plaids.

These thermals might be the most eye-catching Ive seen, with a variety of fun colors and prints.

They’re warm and cozy with a relaxed fit, making them perfect for lounging at home.

Merino Wool All-Season Base Layer Tee

Quince

Plus, the henley-style top and waffle-knit bottoms can be worn separately throughout the season.

Brooks Womens Momentum Thermal Tight

Brooks

Not everyone enjoys the feel of super snug tights.

If you want to try out long johns, the Brooks Momentum Thermal Tights are an excellent choice.

Patelai 3 Sets Thermal Underwear

Amazon

Plus, they come with UPF 50+ sun protection to shield you from harmful UV rays all year round.

Santic Womens Thermal Cycling Tights

Thermal bike tights are an excellent choice for cyclists facing winter weather.

Their snug fit means you’re able to easily wear them underneathski pantsfor added warmth.

Brooks Notch Thermal Long-Sleeve 2.0 Shirt

REI

X-Bionic Neckwarmer

X Bionic

Im a huge fan of X-Bionics base layers, particularly theTrekking Energizer Pants.

Theyre moisture-wicking and breathable, making them perfect for outdoor activities.

I take it with me when I go running, cross-country skiing, and even shopping in alpine villages.

Rocky Thermal Underwear

Amazon

Its great for unpredictable weather and keeps my neck warm and protected from chilly winds.

For those who tend to get cold quickly, the X-Bionic Bondear Cap is just what you need.

It fits comfortably under yourski helmet, keeping you warm and snug.

followme 2 Piece Base Layer Thermal Underwear Set

Amazon

Shop More T+L-Approved Picks

Momentum Thermal Tight

Brooks

Santic Winter Women’s Cycling Pants

Amazon

Neckwarmer

X Bionic

Bondear Cap

X Bionic

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