Best Hiking Underwear for Women and Men (2024): Wool, Moisture-wicking and More

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Hiking underwear for both women and men is one of the most undervalued pieces of hiking gear. That is, until you’ve experienced painful chafing from underwear that rubs.

Or hiked in uncomfortable underwear soaked in sweat. The right ones will keep you comfortable and dry for the duration of your hike, whether you’re hiking in cold or warm weather.

When you think of hiking gear, underwear is probably not the first thing that comes to mind. You likely think of hiking backpacks, hiking jackets or hiking boots.

If you’ve ever had a bad experience with chafing, whether it be thigh chafing, underarm chafing or somewhere else, you know how important it is. And if you haven’t, trust me, you don’t want to. I’ve had chafing so bad that it actually bled!

There’s even quick-drying and moisture-resistant active underwear, backpacking underwear perfect if you’re doing a multi-day hiking tour and want to keep your load light since you arrive late afternoon; wash it, and it will be dry the morning.

And of course, hiking underwear is your important base layer to keep you warm in cold weather when the temperature dips on winter hikes.  

You may also be surprised to learn that the right underwear for hiking can actually keep you cool in hot weather as well. 

Underwear for hiking is more expensive than regular underwear, especially cotton underwear, which makes you very sweaty. But the extra price for a pair of hiking underwear is worth it for all the benefits they offer.

wear proper hiking underwear when winter hiking in very cold weather to help keep you warm

I’ve been hiking for over 20 years and after a lot of experimenting, highly recommend merino wool as my top choice because it’s a breathable fabric and much better for the environment than other synthetic materials.

If you’re looking for underwear for hiking at a more affordable price, look for ones that contain a wool blend with synthetic fibres. These will usually be cheaper than 100% merino wool, and are the next best thing in my opinion.

Given its importance, I’ve come up with the best hiking underwear for women and men. Merino wool underwear of course being the best in my book.

I’m a huge fan of anything by Smartwool, Icebreaker, ExOfficio or Patagonia for their high-quality underwear that last but read on to see which one fits you and your needs the most.

Best Women’s Hiking Underwear

SmartWool Underwear for Women

Smartwool uses 100% climate-positive wool which I love. Their base layers help you stay warm and stay out longer. I also love that they offer women’s plus-size base layers, a market that frequently gets left out when hiking underwear should be available for any BODY type who wants to get out on an adventure. 

Best Lightweight Top
Smartwool Classic All-Season Long-Sleeve Merino Baselayer - Women's Black, S

This lightweight base layer is an excellent choice when you only need light insulation. Its moisture-wicking capabilities will help keep you dry when you sweat. It's a great performance layer when hiking in warmer conditions. 


  • Has a slim fit
  • Designed with a crew neck and long raglan sleeves perfect for backpacking trips
  • Made of 77% merino wool, 13% nylon
Buy on Amazon
Excellent Thermal Regulating Hiking Underwear
Smartwool Women's Merino 150 Bikini

With moisture-wicking technology and odor control thanks to antimicrobial properties these Smartwool Women's Merino 150 Bikini style briefs fit well and help regulate your body temperature. This breathable underwear are also quick-drying, making them a perfect choice for multi-day hiking trips or backpacking.


  • Quick- dry underwear
  • Odor-resistant
  • 88% Merino Wool/12% Nylon
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Excellent Anti-Chafing Underwear
Smartwool Seamless Hipster

While these admittedly aren't the most affordable panties you'll ever buy, they're soooo comfortable. whether you're hiking or just relaxing. They wick moisture away, don't ride up, and because they're seamless; you won't have to worry about thigh chafing. 


  • Made with 88% Merino Wool/12% Nylon
  • Is moisture-wicking and odor resistant thanks to antimicrobial properties
  • Temperature regulating
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Ideal Anti-Chafe Hiking Underwear
Smartwool Merino 250 Base Layer Bottoms

Versatile and warm, these Smartwool base layer bottoms are perfect for winter hiking. And they have moisture-wicking properties when you start to sweat. They feature a merrow seam, so you won't have inner thigh chafing. You won't find a more comfortable fit.


  • Feature a merrow seam and a flat waistband
  • Slim Fit
  • Weighs 7.3oz
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Excellent Seamless Sports Bra
Smartwool SW000847001S Women's Seamless Strappy Bra Black S

This seamless strappy bra offers good support, and the knit cups are designed to provide lift and shape so you don't have to worry about having a mono-boob as you do with some sports bras. Being seamless, you also don't have to worry about underarm chafing when you sweat. However, if you have large breasts, you may find that it doesn't offer the support you want. But it's a good choice for hiking and to wear if you have an active lifestyle. 


  • Merino fabric keeps you dry and odor-free
  • Engineered knit cups that provide shape and lift

Has removable padding so that you can use it while hiking, or lounging around

Buy on Amazon

Related Reading: 14 Best Hiking Sandals for Women

Best Icebreaker Underwear for Women Hikers

I love Icebreakers’ philosophy of the relationship between people and nature, focusing on kinship and not conquering. Driven by the belief that nature has the solutions, they provide products made of natural fibres instead of synthetic-based to create a healthier, more sustainable future.

Ultra-Soft Hiking Underwear for Women
Icebreaker Merino womens Sprite Hot Pants Merino Wool base layer underwear, Black, Medium US

This pair of underwear is great for winter. Icebreaker Spite's merino wool underwear will keep you warm and dry. It's a great fit that is slimming yet comfortable, as they are ultra-soft on the skin. You can't go wrong with this great pair of merino wool briefs


  • Made of 85% Merino wool and 15% synthetic fabric
  • Features jersey corespun fabric and nylon fibres for added strength and durability
  • Low-rise Merino underwear with full coverage
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Great Choice for a Wireless Bra from Merino Wool
Icebreaker Siren

If you don't like wearing underwire bras, then the Icebreaker Siren is an excellent option for you. It doesn't have side seams, so is chafe-free and allows for better movement and comfort while hiking. The elastic strap design gives you additional versatility.


  • A sleek design with no-side-seam construction for everyday comfort and easy layering.
  • A top-rated fit with thin adjustable elastic straps.
  • Made of 83% merino wool, and a blend of nylon
Buy on Amazon

Best Exofficio Underwear for Women Hikers

Since 1987, ExOfficio has been making lightweight, wrinkle-free fabrics brilliantly designed with bug, sun, water, and odor protection since1987.

You only need two pairs on any trip since they dry so far, so they’re perfect as high-quality travel underwear or as backpacking underwear. And did I mention how comfortable they are?

Excellent Lightweight Bikini Briefs
ExOfficio Give-N-Go Bikini Briefs

ExOfficio Give-N-Go offers a few different underwear styles so you'll find something according to your personal preference. Made with breathable mesh, the ExOfficio Give-N-Go bikini briefs keep you dry and comfortable.

They're made with odor resistant technology and are machine washable and can be washed in warm water. They retain their shape and won't stretch out. They're great for daily wear and are also a great pair of backpacking underwear. 


  • The quick-dry featuremakes them high quality travel underwear or perfect for multi-day hiking trips
  • Made with 94% Nylon, 6% Lycra Spandex blend
  • Designed to provide airflow and prevent odor and moisture
Buy on Amazon
Exceptional Breathable Mesh Bikini Briefs
ExOfficio Give-N-Go Sport Mesh Bikini Brief

These hiking panties are excellent for multi-day hiking, travel and everyday wear. This quick-dry underwear and made with a breathable mesh, so it's moisture-wicking and odor resistant. You won't find a more comfortable bikini brief.


  • Breathable mesh hiking underwear to keep you comfortable
  • Made with 93% Nylon, 7% Lycra Spandex fabric blend
  • Smooth and soft waistband
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Great for Wearing Under Thin Hiking Pants and for Travel
ExOfficio Women's Give-n-go String Bikini

If you're looking for a different style of underwear, this string bikini fits the bill. With an excellent active fit, this hiking underwear will give you optimum comfort on your hikes. . The mesh fabric is odour resistant, quick-drying and moisture-wicking. They also come in a wide range of prints and colors.


  • Made with 94% Nylon and 6% Lycra Spandex
  • Anti-odor treatment keeps this underwear feeling fresher and longer
  • Breathable mesh improves airflow, enhancing comfort while travelling
Buy on Amazon

Related Reading: The Best Hiking Boots for Men

Best Patagonia Women’s Underwear for Hikers

At Patagonia, alpinism remains at the heart of a worldwide business for silent adventures that don’t require a motor or cheers from a crowd. The reward is the hard-won grace and moments of connection between us and nature.

Patagonia also donates at least 1% of their sales to hundreds of grassroots environmental groups all over the world who work to help reverse the tide.

While it is expensive, I do love Patagonia Women’s line, and it is high quality. 

More Merino Wool Underwear for Women Hikers 

Best 100% Merino Wool Long Johns for Women
Lapasa Thermal Underwear Long John Set

The Lapasa thermals are made with rib-knit merino wool and will keep you warm and comfortable. They are stretchy and will keep you warm in cool conditions. This is a great choice when you want a matching top and bottom. 


  • These thermal underwear are soft and smooth feel without the itchy feel
  • Features effective insulation while maintaining breathability
  • Can be worn as a base layer that will wick away moisture while keeping you cosy.
Buy on Amazon
Excellent 100% Merino Wool Fast Drying Thermal Pants
Meriwool Base Layer Thermal Pants

Quick-drying and odour resistant, this merino wool underwear are great for hiking. They offer you great comfort and are light enough to use as a base layer without weighing you down.


  • These are odour resistant to keep you feeling fresh all-day
  • Made with breathable fibres
  • Ideal for layering as it is lightweight
Buy on Amazon
Excellent 100% Merino Wool Women's Fast Drying Thermal Top
Meriwool Long Sleeve Base Layer

This base layer is made with high-quality merino wool that will keep warm and comfortable on your hike.This microbial underwear is odour resistant and quick-drying, so you won't have to worry about changing too often on a long hiking adventure. This hiking underwear also comes in stylish colours.


  • Made with 100% all-natural superfine 18.5-micron Merino wool ensures comfort all day long
  • Slim-fit thermal shirt
  • Breathable and odour resistant to keep you feeling fresh all-day
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100% Merino Wool Midweight Base Layer
Minus33 Franconia Women’s Midweight Base Layer Pants

These thermal bottoms are three-season, made of 100% merino wool and have the versatility and warmth to be one of your key pieces of hiking gear. These Midweight bottoms can be worn as low as 0 degrees F or as high as 60 F.

You can wear them as a base layer, mid-layer, or even as an outer layer, making them incredibly versatile. 

  • Feature moisture-wicking properties so you don't have to wash them after every use
  • 100% 18.5 Micron Merino Wool 230 g/m2 Interlock knit construction with flat seams for comfort
  • UPF Rating 50+.
Buy on Amazon

More Women’s Hiking Underwear

Women's Hiking Underwear for Hot Weather
Reebok Women's Underwear

Reebok Women's underwear have been crafted with moisture-wicking fabric, which means they stay dry all day long. They're also made out of breathable mesh so you won't feel hot during those summer days when temperatures soar above 90 degrees F (32 C). In addition, these shorts feature a contoured elastic waistband and flatlock seams. This ensures that the shorts fit comfortably all day long.


  • Reebok Women's underwear features super soft microfiber fabric that provides supreme comfort and support
  • Offers a flattering shape and no panty lines
  • Gives you complete coverage and prevents unwanted bulges
Buy on Amazon
Sexy-style Undwear Style
Under Armour Women's Pure Stretch Thong

The Pure Stretch Thong is laser cut, ensuring that you have no seams to cause discomfort. They fit perfectly, and the fabric also offers odour control. You won't have a problem keeping dry with them either, as the material is moisture-wicking.


  • Made of 68% Nylon,32% Elastane
  • New super-soft stretch fabric delivers excellent all-day comfort for any activity
  • Laser-cut edges offer a hem-free construction for a smoother and more flattering silhouette
Buy on Amazon

Best Men’s Hiking Underwear

The Best Merino Wool Underwear for Men

Best 100% Merino Wool Underwear for Men
Meriwool Boxer Briefs

These 100% merino wool briefs are super comfortable. The specific knit allows for optimum breathability and moisture-wicking. They also include a loop for easy hanging no matter where you are. This hiking underwear is a must-have for winter explorations.


  • These fit snuggly and provide gentle support
  • They have a natural wicking and odour-resistant property
  • Quick-dry underwear made of merino wool 
Buy on Amazon
Best Slim Fit Hiking Underwear for Men
Icebreaker Merino Anatomica Boxers

This merino blend brief offers you comfort and great mobility. You'll be able to move freely in these boxers, leaving you with less chafing. This hiking underwear is excellent for any activity and will keep you warm in winter.


  • These are slim fit and very stretchy
  • Made with 83% Merino Wool, 12% Nylon, 5% ElastaneMade for next-to-skin softness
  • Breathable for all-day comfort.
Buy on Amazon
Excellent Ergonomic Design
Apex Merino Wear Boxer Briefs

With its ergonomic fly, you'll be guaranteed comfort and support. The Apex Merino has a longer leg is designed to reduce chafing on your upper legs.


  • Made from 100% Australian merino wool
  • Lightweight, sweat-resistant comfort all day long.
  • The front pouch offers better support and stability
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Excellent Thermal Pants for Men
Meriwool Base Layer 250

The Meriwool Base Layer offers the ultimate comfort. Made with ultrafine merino wool fibres. Y,ou won't find softer hiking underwear. It is perfect as a base layer and will keep you dry and warm. Best of all, they're easy to care for and quick dry underwear


  • These fit snuggly and provide gentle support
  • They have a natural wicking and odour-resistant property
  • A quick-drying blend of merino wool hiking underwear
Buy on Amazon
Available in Different Vibrant Colors for Men
Lapasa Merino Base Layer 250

Made of 100% merino wool, you are guaranteed comfort. This hiking underwear for men is an excellent base layer and works to keep you cool in summer and warm in winter. It's breathable and comfortable and more affordable underwear than some of the name brands. 


  • Naturally hygienic properties
  • The durable 4-way stretch rib knit hem moves with your body
  • Odor-resistant
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Best for Reducing Chafing for Men
Smartwool Boxer Brief Sport 150

These Smartwool boxer briefs have a fullyfunctional and a flatlock seam to eliminate chafing. They're naturally odor-resistant and breathable and are sure to keep you dry on your hike.


  • 87% Merino Wool 13% Nylon
  • Machine washable in warm water
  • Microial underwear so that they're odor-resistant and breathable
  • Quick-dry underwear
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Ultra Smooth Merino Hiking Underwear for Men
Smartwool Base Layer 150

These are so soft; you'll forget you are wearing them. The Smartwool Base Layer 150 has moisture-wicking technology that will keep you dry. This hiking underwear is an excellent base layer, and you won't have to worry about pesky chafing while wearing them.


  • These have a comfortable slim fit
  • Warm Mid rise base layer
  • Has moisture-wicking technology that will keep you dry.
Buy on Amazon

Related Reading: The Best Women’s Clothes for Hiking

Perfect for Snowy Adventures
Smartwool Base Layer 250

This hiking underwear offers you great comfort and anti-chafing technology. Made with 100% merino wool, it is odour resistant and will wick away any moisture. The targeted insulation and ventilation ensure that you stay warm in all the right places.


  • These bottoms are made with an interlock knit for enhanced comfort and breathability
  • They are thermoregulated for warmth and odour resistance
  • Merino-covered waistband and traditional fly design
Buy on Amazon

More Men’s Hiking Underwear

Best Ultralight Hiking Underwear
Exofficio Men's Give'N'Go Boxer Brief

These Exofficio Men's Give-N-Go boxer briefs are lightweight, comfortable, breathable and odor resistant. This hiking underwear is perfect for under your base layer. These quick-dry underwear are perfect for multi-day hikes


  • Ultralight breathable mesh fabric to keep you cool
  • Durable synthetic underwear
  • Microbial underwear for Improved anti-odour treatment to keep you fresher, longer
Buy on Amazon
Best Active Fit for Men
Exofficio Men’s Give-N-Go Sport

The ExOfficio Men's Give-N-Go Sport Mesh briefs are made with antimicrobial properties to help reduce odour, making them great for all kinds of outdoor activities. They include a versatile mesh, which allows for better breathability. They're super easy to care for, just wash in warm water. 


  • Made with antimicrobial properties to reduce odour
  • The versatile mesh allows better breathability
  • Ultra quick-drying hiking underwear
Buy on Amazon
Excellent Multi-Day Men's Hiking Underwear
ExOfficio Men's Give-N-Go Performance Base Layer

This hiking underwear is the perfect lightweight layer that offers comfort and prevents again odor buildup. Also, the antimicrobial properties makes this base layer breathable and moisture-wicking.


  • Flatlock seams reduce chafing
  • Designed with a wide and comfortable waistband
  • Snug active fit and lower rise
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Best Antichafing Men's Underwear
Under Armour Men's Tech 6-inch Boxerjock 2-Pack

This hiking underwear is made with 4-way stretch fabric, which will ensure you can comfortably move around. Every seam has been added with careful thought to ensure that these briefs remain comfortable even if worn for an extended period.


  • Ultra-soft and breathable
  • No side or back seams for ultimate comfort
  • 4-way stretch construction moves better in every direction
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Comes in an Assortment of Colors
Men's Ridge Boxer Briefs

The Ridge Boxer Briefs will wick moisture and add comfort to your hike. This hiking underwear is made with flatlock seams to ensure less chafing. They are also odour resistant and are made to be durable and long-lasting.


  • Made with a mesh fly to provide ventilation and support
  • With no-ride-up legs and strategically placed breathable mesh
  • Wicks away moisture so you can stay cool and dry.
Buy on Amazon

Hiking underwear is undervalued as hiking gear. That is, until you’ve experienced underwear soaked in sweat or painful chafing. Now you know why it’s so important, what to look for, and our top recommendations.

Check out our article to learn more about the benefits of merino wool and our article on Winter Hiking Tips. 

This post has been updated and republished.

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