The Ultimate Guide to the Best Backpacking Underwear of 2025

When it comes to backpacking, comfort is key — and that starts with the right underwear. The best backpacking underwear should provide moisture-wicking properties, odor resistance, and a fit that prevents chafing. Whether you’re hiking through a humid forest or traversing rocky terrain, choosing quality underwear can significantly enhance your outdoor experience. In this guide, we’ll explore the different types of backpacking underwear, compare their key features, and provide recommendations based on expert reviews and user experiences.

Comparison Table: Types of Backpacking Underwear

Type	Material	Key Features	Best For
Boxer Briefs	Synthetic / Merino	Moisture-wicking, odor-resistant, stretchy	Long hikes, everyday use
Briefs	Cotton / Synthetic	Breathable, comfortable, less coverage	Casual wear, light activities
Thongs	Synthetic	Minimal coverage, quick-drying	Hot weather, minimalists
Long Underwear	Merino / Synthetic	Insulating, moisture-wicking, layered	Cold weather, base layers
Compression Shorts	Synthetic	Supportive, reduces muscle fatigue	Intense activities, cycling

Understanding the Importance of Backpacking Underwear

Why Choose Quality Underwear?

Quality underwear is crucial for comfort during backpacking trips. Poorly designed underwear can lead to chafing, irritation, and discomfort, especially during long hikes. High-quality materials, such as Merino wool and synthetic blends, offer moisture-wicking properties and breathability, which are essential in various climates.

Key Features to Look For

1. Moisture-Wicking: The ability to draw sweat away from your body helps keep you dry.
2. Odor Resistance: Fabrics that prevent odor build-up allow for extended wear without discomfort.
3. Comfortable Fit: A snug but not overly tight fit helps prevent chafing and movement restrictions.
4. Quick-Drying: Essential for washing on the go, as it allows you to clean your underwear and have them dry for the next day.

Types of Backpacking Underwear

1. Boxer Briefs

Boxer briefs are a popular choice among backpackers. They provide a good balance of coverage and support, making them ideal for hiking. Brands like 32 Degrees offer synthetic mesh boxer briefs that are not only comfortable but also dry quickly, making them suitable for multi-day trips.

2. Briefs

For those who prefer less coverage, traditional briefs may be the way to go. They are often made from breathable fabrics and can be a comfortable option for light activities or casual wear. However, they may not provide the same level of support during strenuous hikes.

3. Thongs

Thongs are excellent for minimalists or those hiking in hot weather. They provide the least coverage and are typically made from quick-drying materials. While not everyone’s preference, they can reduce the risk of chafing for some users.

4. Long Underwear

In colder climates, long underwear serves as a great base layer. Merino wool options are highly recommended for their insulating properties and moisture-wicking capabilities. As highlighted by Field & Stream, these can keep you warm and dry during chilly hiking adventures.

5. Compression Shorts

For high-intensity activities like cycling or running, compression shorts can provide muscle support and reduce fatigue. These are generally made from synthetic materials that help wick moisture away from the skin.

Technical Comparison of Popular Backpacking Underwear

Brand/Model	Material	Moisture-Wicking	Odor Resistance	Quick-Dry Time	Price Range
32 Degrees Active Mesh Boxer Brief	Nylon/Elastane	Yes	Moderate	1-2 hours	$$
Smartwool Merino Boxer Brief	Merino Wool	Yes	High	2-4 hours	$$$
SAXX Vibe Boxer Brief	Modal/Elastane	Yes	High	1-2 hours	$$$
Icebreaker Anatomica Boxers	Merino Wool	Yes	High	2-3 hours	$$$$
ExOfficio Give-N-Go Brief	Nylon/Spandex	Yes	Moderate	1-2 hours	$$

Tips for Choosing the Right Backpacking Underwear

1. Consider the Climate: Choose materials that suit the weather conditions. Merino wool is ideal for colder weather, while synthetic options may be better for warmer climates.
2. Fit Matters: Always try on underwear or check sizing guides to ensure a comfortable fit that won’t ride up or bunch.
3. Durability: Look for reinforced stitching and high-quality fabrics that can withstand the rigors of outdoor activities.
4. Pack Extra Pairs: Having a couple of extra pairs can be a lifesaver on longer trips where washing may be required.

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Conclusion

Choosing the right backpacking underwear is essential for comfort during your adventures. With options ranging from boxer briefs to long underwear, there’s something to suit every hiker’s needs. Prioritize moisture-wicking, odor resistance, and a comfortable fit to ensure a pleasant experience on the trail. Brands like 32 Degrees, Smartwool, and SAXX offer excellent choices to consider for your next trip.

FAQ

What is the best material for backpacking underwear?
The best materials for backpacking underwear are synthetic blends and Merino wool. These fabrics provide moisture-wicking properties, odor resistance, and quick-drying capabilities.

How many pairs of underwear should I pack for a backpacking trip?
It’s recommended to pack at least two pairs of underwear for each day of your trip, plus an extra pair in case of emergencies.

Can I wear regular cotton underwear for hiking?
While you can wear cotton underwear, it is not recommended for hiking as it retains moisture and can lead to chafing. Opt for moisture-wicking fabrics instead.

How do I care for my backpacking underwear?
Most backpacking underwear can be machine washed, but it’s best to follow the care instructions on the label. For quick cleaning on the trail, wash them in a sink with mild detergent and allow them to air dry.

What is odor resistance in underwear?
Odor resistance refers to the fabric’s ability to prevent the buildup of bacteria and odors, keeping your underwear fresher for longer, especially during extensive wear.

Are there specific underwear designs for men and women?
Yes, there are designs tailored for both men and women, considering anatomical differences for comfort and fit.

Do I need to invest in expensive underwear for backpacking?
While there are budget options available, investing in quality underwear often pays off in comfort and durability during your trips.

What is the best way to prevent chafing while hiking?
Choosing the right underwear with a snug fit, moisture-wicking properties, and using anti-chafing creams can help prevent chafing during hikes.

Can I wear the same pair of underwear for multiple days?
While it’s not ideal, good-quality moisture-wicking underwear can be worn for multiple days if necessary, especially if cleaned and dried properly.

What are some brands known for high-quality hiking underwear?
Some reputable brands include 32 Degrees, Smartwool, SAXX, Icebreaker, and ExOfficio, known for their durable and comfortable options.