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What Are The Best Base Layers in 2025

"Choosing the Right Base Layers: A Friendly Guide to Staying Comfortable in the Great Outdoors" When it comes to outdoor adventures, having the right base layers can make all the difference in your comfort and performance. First and foremost, consider the fabric; merino wool is a fantastic choice for its warmth and moisture-wicking properties, while synthetic materials can offer durability and quick drying times. Fit is also crucial—opt for a snug but not restrictive fit to ensure effective moisture management without feeling constricted. Don't forget about temperature regulation; look for base layers designed for specific weather conditions, whether you're facing the chill of winter or the heat of summer. Additionally, pay attention to seams and tags—flatlock seams and tagless designs can prevent chafing during long hikes or climbs. Finally, think about versatility; choosing base layers that can easily transition from a day on the trail to a cozy evening by the campfire will maximize your investment. With these tips in mind, you’ll be well-equipped to select the best base layers for your next outdoor escapade!

1

Under Armour Men's ColdGear Armour Compression Leggings

Under Armour Men's ColdGear Armour Compression Leggings
Buy Now $20.15

Why We Love It

Reviewers rave about the warmth and comfort these leggings provide. The fast-drying exterior is also a hit among users, keeping them dry during activities. The 4-way stretch construction is praised for allowing freedom of movement. Many also appreciate the anti-odor technology, making these leggings a great choice for multi-day wear.

Pros

  • Warm and fast-drying
  • 4-way stretch construction
  • Anti-odor technology

Cons

  • May run small
  • Material might be thin for some users

Men's ColdGear compression leggings designed for cold weather.

The Under Armour Men's ColdGear Armour Compression Leggings are designed for cold weather conditions. They feature a dual-layer fabric with an ultra-warm, brushed interior and a smooth, fast-drying exterior. The 4-way stretch construction allows for better movement in all directions and the material wicks sweat and dries really fast. These leggings also feature anti-odor technology to prevent the growth of odor-causing microbes.

2

Under Armour Men's ColdGear Armour Compression Mock Long Sleeve T-Shirt

Under Armour Men's ColdGear Armour Compression Mock Long Sleeve T-Shirt
Buy Now $20.15

Why We Love It

The Under Armour Men's base layer is praised by users for its warmth and fast-drying capability. It's also appreciated for its comfort and 4-way stretch construction that allows for better movement. The high-quality materials used make this a durable choice for outdoor activities.

Pros

  • Warm
  • Fast-drying
  • 4-way stretch construction

Cons

  • Fits tight
  • Not very breathable

Men's compression mock long sleeve T-shirt made from polyester and elastane.

The Under Armour Men's ColdGear Armour Compression Mock Long Sleeve T-Shirt is made from 87% polyester and 13% elastane. It features dual-layer fabric with an ultra-warm, brushed interior and a smooth, fast-drying exterior. The 4-way stretch construction allows for better movement in all directions.

3

Helly Hansen Lifa Stripe Crew

Helly Hansen Lifa Stripe Crew
Buy Now $499.99

Why We Love It

Users commend the Helly Hansen Lifa Stripe Crew for its excellent moisture management, making it ideal for intense activities. The lightweight fabric is highly appreciated for its comfort and insulating properties. Users also praise the flat lock stitching, which enhances comfort and durability.

Pros

  • Excellent moisture management
  • Lightweight fabric
  • Comfortable fit

Cons

  • May run small
  • Not very warm

Unisex base layer with moisture-wicking technology.

The Helly Hansen Lifa Stripe Crew base layer features Lifa Stay Dry Technology, which delivers superior moisture management, making it ideal for outdoor activities in all weather conditions. Made from a lightweight fabric, it offers excellent insulating and wicking properties. The base layer is also designed with flat lock stitching for reduced bulk and enhanced comfort.

Product Comparison

Compare features across all products in this category

6 Features 6 Products Updated Oct 04, 2025
Product Material Composition Weight (g/m2) Moisture-Wicking Odor-Resistance Stretch Type Price ($)
1 Meriwool Men's Merino Wool Midweight Baselayer
100% Merino Wool Yes Yes Yes N/A N/A
2 Smartwool Women's NTS Mid 250 Crew Top
100% Merino Wool Yes Yes Yes N/A N/A
3 Icebreaker Merino Men's 200 Oasis Long Sleeve Crewe
100% Merino Wool Yes Yes Yes N/A N/A
3 Under Armour Men's ColdGear Armour Compression Leggings
Dual-layer fabric (87% Polyester, 13% Elastane) N/A Yes Yes 4-way Stretch Yes
4 Under Armour Men's ColdGear Armour Compression Mock Long Sleeve T-Shirt
87% Polyester, 13% Elastane N/A Yes N/A 4-way Stretch N/A
5 Terramar Women's Thermasilk Pointelle Scoop
100% Pure Silk N/A Yes N/A Natural Stretch N/A
1

Meriwool Men's Merino Wool Midweight Baselayer

Material Composition
100% Merino Wool
Weight (g/m2)
Yes
Moisture-Wicking
Yes
Odor-Resistance
Yes
Stretch Type
N/A
Price ($)
N/A
2

Smartwool Women's NTS Mid 250 Crew Top

Material Composition
100% Merino Wool
Weight (g/m2)
Yes
Moisture-Wicking
Yes
Odor-Resistance
Yes
Stretch Type
N/A
Price ($)
N/A
3

Icebreaker Merino Men's 200 Oasis Long Sleeve Crewe

Material Composition
100% Merino Wool
Weight (g/m2)
Yes
Moisture-Wicking
Yes
Odor-Resistance
Yes
Stretch Type
N/A
Price ($)
N/A
3

Under Armour Men's ColdGear Armour Compression Leggings

Material Composition
Dual-layer fabric (87% Polyester, 13% Elastane)
Weight (g/m2)
N/A
Moisture-Wicking
Yes
Odor-Resistance
Yes
Stretch Type
4-way Stretch
Price ($)
Yes
4

Under Armour Men's ColdGear Armour Compression Mock Long Sleeve T-Shirt

Material Composition
87% Polyester, 13% Elastane
Weight (g/m2)
N/A
Moisture-Wicking
Yes
Odor-Resistance
N/A
Stretch Type
4-way Stretch
Price ($)
N/A
5

Terramar Women's Thermasilk Pointelle Scoop

Material Composition
100% Pure Silk
Weight (g/m2)
N/A
Moisture-Wicking
Yes
Odor-Resistance
N/A
Stretch Type
Natural Stretch
Price ($)
N/A

Frequently Asked Questions About Base Layers

What makes a base layers the "best"?

We evaluate products based on quality, performance, value for money, user reviews, durability, and ease of use. Our rankings are updated regularly to reflect the latest market offerings and user feedback.

How often do you update your base layers recommendations?

Our team continuously monitors the market for new products and updates our recommendations quarterly. We also adjust rankings based on user feedback and new testing results.

Do you test all the products you recommend?

Yes, whenever possible, we physically test products in our labs. For products we can't test directly, we rely on verified user reviews, expert opinions, and detailed specifications to make informed recommendations.

What if I'm looking for a specific type of base layers?

Our top 10 list covers the most popular and highly-rated options. If you have specific requirements, check our detailed product descriptions and pros/cons to find the best match for your needs.