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Jimmy crossing Illawong bridge near Guthega in Kosciusko national park

Clothing | Base Layers

Your base layer is arguably the most important layer in your layering system, it wicks away moisture keeping you warm and dry. At Tom's Outdoors, we have a great range of Patagonia & Icebreaker base layers and thermal underwear for you to choose from. Read our guide on layering here.

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WHAT IS A THERMAL BASE LAYER?

A thermal base layer is an essential piece of clothing for cold-weather activities, designed to keep you warm by managing moisture and insulating your body. Worn as the first layer against your skin, thermal base layers come in different weights and densities to cater to various activity levels and temperature needs. Lightweight options are ideal for high-intensity activities where breathability is a priority, while midweight and heavyweight layers provide additional warmth for lower-intensity activities or colder conditions. Choosing the right weight ensures that you stay comfortable without overheating or feeling restricted.

HOW DO THERMAL BASE LAYERS WORK?

Thermal base layers work by managing moisture and regulating body temperature, helping you stay warm, dry, and comfortable. The fabric’s unique properties play a vital role in this:

Hydrophilic Properties: A good thermal base layer will be hydrophilic, meaning it’s highly absorbent. It quickly pulls sweat away from your skin, helping you stay dry and preventing the buildup of moisture, which can make you feel cold.

Hydrophobic Properties: Once moisture is absorbed, a quality base layer fabric will also be hydrophobic, meaning it dries quickly. This prevents wet fabric from clinging to your skin and making you cold. By keeping you both dry and warm, a thermal base layer effectively acts as a buffer between you and the cold weather, ensuring comfort during various outdoor activities.

These properties work together to trap a layer of warm air close to your skin while wicking moisture away, so you can stay warm without feeling clammy.

ARE MERINO THERMAL BASE LAYERS WORTH THE MONEY?

Merino wool thermal base layers are highly regarded for their natural temperature-regulating, moisture-wicking, and odor-resistant properties. Unlike synthetic materials, merino wool fibers are incredibly fine and soft, offering warmth without itchiness. Merino is both hydrophilic and hydrophobic, allowing it to absorb moisture while drying quickly, so you stay comfortable even during high-intensity activities.

Although merino thermal layers are often more expensive than synthetics, their comfort, durability, and ability to perform in diverse conditions make them worth the investment for many. If you spend a lot of time outdoors in cold conditions or prioritize comfort and performance, merino wool thermals are a great choice.

NEED HELP CHOOSING A BASE LAYER? CONTACT US TODAY

If you would appreciate some additional advice. Simply get in touch with our friendly sales team – they’re always up for a chat. You can contact us by calling our Tumut store on (02) 6947 4062 or by email.

Icebreaker Women's 260 Tech Leggings

Icebreaker
Original price $159.99 - Original price $159.99
Original price
$159.99
$159.99 - $159.99
Current price $159.99

Product Description A warmer mid-weight version of the Icebreaker Oasis Leggings, designed to handle frigid days on the trail or mountain. Th...

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Icebreaker Men's 260 Tech Leggings

Icebreaker
Original price $159.99 - Original price $179.99
Original price $159.99 - Original price $179.99
Original price $159.99
$114.00 - $124.00
$114.00 - $124.00
Current price $114.00

Product Description A warmer Midweight version of the Oasis Leggings. Perfect for frigid days on the trails or the mountain, the updated 260 ...

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Icebreaker Men's 200 Oasis Leggings

Icebreaker
Original price $129.99
Original price $129.99 - Original price $129.99
Original price $129.99
Current price $89.00
$89.00 - $89.00
Current price $89.00

Product Description Icebreaker's best-selling active baselayer bottoms made with ultra-comfortable 100% merino jersey fabric and an updated d...

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Icebreaker Men's 200 Oasis 3/4 Leggings

Icebreaker
Original price $109.99 - Original price $129.99
Original price $109.99 - Original price $129.99
Original price $109.99
$79.00 - $89.00
$79.00 - $89.00
Current price $79.00

Product Description Easy layering, warmth, unmatched breathability and moisture wicking for all your cold weather pursuits. The Icebreaker M...

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