Apparel & Safety

Best Base Layers

20 products reviewed · Updated for 2026

About Our Best Base Layers Reviews

When it comes to outdoor activities like hunting and hiking, choosing the right base layers can make all the difference in comfort and performance. Merino wool and synthetic options each offer unique benefits, such as moisture-wicking properties and temperature regulation. In this guide, we’ll explore top choices from trusted brands to help you find the best base layers for your next adventure.

Every product below is something outdoor enthusiasts actually buy and recommend. We research, compare, and rank each item so you can make confident purchasing decisions.

Best Overall
First Lite 250 Merino Wool Crew Top
1

First Lite 250 Merino Wool Crew Top

WHY WE RECOMMEND IT

Exceptional warmth-to-weight ratio
Naturally odor-resistant
Moisture-wicking performance
Smartwool Merino 250 Base Layer Bottoms
2

Smartwool Merino 250 Base Layer Bottoms

WHY WE RECOMMEND IT

Flatlock seams for comfort
Temperature regulation
Durable for rugged use
Icebreaker Oasis Long Sleeve Crewe
3

Icebreaker Oasis Long Sleeve Crewe

WHY WE RECOMMEND IT

Lightweight yet warm
Breathable for high-intensity activities
Natural moisture management
Sitka Gear Core Lightweight Crew
4

Sitka Gear Core Lightweight Crew

WHY WE RECOMMEND IT

Quick-drying synthetic fabric
Anti-odor technology
Lightweight for layering
Minus33 Merino Wool 706 Chocorua Bottoms
5

Minus33 Merino Wool 706 Chocorua Bottoms

WHY WE RECOMMEND IT

Thermal regulation
Soft feel against skin
Wide range of motion
KUIU 145 Merino Wool Top
6

KUIU 145 Merino Wool Top

WHY WE RECOMMEND IT

Breathable and warm
Ultralight design
Natural moisture-wicking
Editor's Pick
Patagonia Capilene Midweight Crew
7

Patagonia Capilene Midweight Crew

WHY WE RECOMMEND IT

Excellent moisture control
Quick-drying properties
Stretchy for mobility
First Lite 200 Merino Wool Bottoms
8

First Lite 200 Merino Wool Bottoms

WHY WE RECOMMEND IT

Lightweight for active use
Odor-resistant properties
Comfortable fit
Smartwool Merino 150 Base Layer Top
9

Smartwool Merino 150 Base Layer Top

WHY WE RECOMMEND IT

Ideal for warm weather
Moisture-wicking capabilities
Durable construction
Icebreaker Tech Lite Short Sleeve Tee
10

Icebreaker Tech Lite Short Sleeve Tee

WHY WE RECOMMEND IT

Versatile for multiple activities
Quick-drying fabric
Naturally breathable
Sitka Gear Core Lightweight Bottoms
11

Sitka Gear Core Lightweight Bottoms

WHY WE RECOMMEND IT

Comfortable fit for layering
Moisture-wicking technology
Fast drying
Minus33 Merino Wool 802 Kancamagus Crew
12

Minus33 Merino Wool 802 Kancamagus Crew

WHY WE RECOMMEND IT

Warm yet lightweight
Stretchable for comfort
Natural breathability
KUIU 145 Merino Wool Bottoms
13

KUIU 145 Merino Wool Bottoms

WHY WE RECOMMEND IT

Lightweight warmth
Natural moisture management
Comfortable fit
Patagonia Capilene Lightweight Bottoms
14

Patagonia Capilene Lightweight Bottoms

WHY WE RECOMMEND IT

Quick-drying and breathable
Durable for extended wear
Comfortable next-to-skin feel
First Lite 150 Merino Wool Tank
15

First Lite 150 Merino Wool Tank

WHY WE RECOMMEND IT

Great for layering
Lightweight design
Odor-resistant features
Smartwool Intraknit Merino 250 Bottoms
16

Smartwool Intraknit Merino 250 Bottoms

WHY WE RECOMMEND IT

Seamless construction for comfort
Warm and breathable
Athletic fit for mobility
Icebreaker 200 Oasis Leggings
17

Icebreaker 200 Oasis Leggings

WHY WE RECOMMEND IT

Ideal for layering in cold weather
Soft and comfortable
Natural temperature regulation
Sitka Gear Traverse Bottoms
18

Sitka Gear Traverse Bottoms

WHY WE RECOMMEND IT

Durable and flexible
Moisture-wicking technology
Designed for active use
Base Layers Pick #19
19

Base Layers Pick #19

WHY WE RECOMMEND IT

Solid all-around performer
Trusted brand in the category
Strong value for the price
Base Layers Pick #20
20

Base Layers Pick #20

WHY WE RECOMMEND IT

Solid all-around performer
Trusted brand in the category
Strong value for the price

From our network: Check out more reviews from our sister sites.