8 Best Women’s Hiking Underwear [2025 Guide]
Looking for the best women’s hiking underwear? This detailed guide has you covered!
When it comes to compiling your hiking essentials, it’s not just about the hiking boots or backpack, but the ‘under-the-radar’ essentials too.
The best women’s hiking underwear can make a significant difference in your overall hiking experience. It ensures you stay dry, comfortable, and chafe-free throughout your journey.
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The best women’s hiking underwear is the Icebreaker Siren Bikini!
I’ll start this post by saying I have worn THE most inappropriate underwear when hiking and I have paid the price for it (hello chafing!) I’ve also found out the hard way why wearing the same pair of cotton undies on a backpacking trip is a no no!
I have tried several of the items on this list and when chosen wisely, the right underwear can significantly enhance your hiking experience.
Let’s delve into what makes the best hiking underwear for Women and why it should be a priority in your hiking checklist.
My Top 3 Picks: Best Women’s Hiking Underwear
Icebreaker Siren Bikini
✅ Ultralight
✅ Regulates Body Temperature
✅ Odour Resistant
ExOfficio Give-N-Go
✅ Flatlock Seams
✅ Breathable
✅ Active-Fit
Best Women’s Hiking Underwear
1. Icebreaker Siren Bikini
When it comes to the best women’s hiking underwear, the Icebreaker Siren Bikini certainly stands out. This piece of gear is crafted from a blend of merino wool and nylon, giving it an incredibly soft feel against the skin, while also providing the durability needed for outdoor adventures.
One of the standout features of the Icebreaker Siren Bikini is its moisture-wicking capabilities. The merino wool naturally keeps you dry by pulling sweat away from your skin, which is vital when you’re hiking and building up a sweat.
The Siren Bikini also shines in terms of fit and comfort. The underwear is designed to provide full coverage while also maintaining a sleek, streamlined profile. It has a low rise and flat seams to reduce the chance of chafing, and the waistband is brushed for added comfort, ensuring it stays in place without causing any discomfort.
Its breathability is exceptional, thanks to the merino wool’s natural temperature-regulating properties. This underwear will keep you cool in hot weather and offer insulation when it’s chilly, making it an excellent choice for hikes in any season.
Plus, the merino wool has natural odour-resistant properties, keeping you fresh throughout your hike. Its thoughtful design makes it well-suited for the outdoor enthusiast who values both function and style.
The ExOfficio Mesh Bikini Brief offers everything a woman could want in hiking underwear. It’s comfortable, breathable, durable, and quick-drying, making it our top choice for the best women’s hiking underwear.
The first thing that stands out about the ExOfficio Mesh Bikini Brief is its use of breathable mesh fabric. This innovative material ensures excellent ventilation, keeping you cool and dry during long hikes. The mesh fabric also allows for quick drying, which is a key feature.
The brief is designed to provide a snug fit, without being too tight or restrictive. It features a low-rise cut and a wide, comfortable waistband that doesn’t dig into your skin. The flatlock seams and smooth fabric prevent chafing and irritation, while the stretchy material ensures the underwear moves with you.
Despite being lightweight and breathable, the mesh fabric is incredibly robust, and can withstand the challenges of hiking and washing without losing its shape or functionality. It is treated to resist odours so you can stay fresh even during multi-day hikes.
3. Patagonia Active Hipster
Constructed with a blend of recycled nylon and spandex, the Patagonia Active Hipster prioritizes comfort and adaptability. This fabric blend guarantees a snug, form-fitting wear that moves with your body, eliminating any hindrance during strenuous activities like hiking.
The incorporation of spandex in the blend ensures the underwear can stretch and adapt to your body movements, providing optimal flexibility.
A standout feature of the Patagonia Active Hipster is its moisture-wicking properties. The underwear is designed to effectively draw sweat away from the body, facilitating quick evaporation and ensuring you stay dry and comfortable.
The robust nature of the recycled nylon makes it resistant to wear and tear, promising longevity. This durability ensures that the underwear retains its shape and functionality even after repeated use and washing.
Another compelling reason to opt for the Patagonia Active Hipster is its eco-friendly approach. The use of recycled nylon in its construction aligns with Patagonia’s commitment to sustainability, allowing consumers to make a conscious, environmentally friendly choice.
4. Smartwool Merino 150
The Smartwool Merino 150 Bikini truly deserves its spot in the best women’s hiking underwear category. As my personal favourite, this underwear impresses with unmatched comfort and an array of benefits, thanks to its merino wool construction.
Merino wool is renowned for its superior temperature-regulating abilities, and the Smartwool Merino 150 Bikini is no exception. Whether it’s scorching summer heat or the bone-chilling cold of winter, this underwear adjusts according to the climatic conditions, ensuring the utmost comfort during your hiking expeditions.
Comfort alone isn’t what makes this underwear exceptional; it’s the hygienic properties of merino wool that set it apart. The Smartwool Merino 150 Bikini is naturally antibacterial and odour-resistant, ensuring you stay fresh throughout your journey, a feature that’s particularly beneficial during multi-day hikes.
The softness of the merino wool against the skin eliminates any potential discomfort or irritation, often associated with other fabrics. The underwear is also designed for a perfect fit, allowing unrestricted movement.
5. Patagonia Barely Hipster Brief
Starting with comfort and fit, the Patagonia Barely Hipster Brief is made from a blend of polyester and spandex, allowing for a snug yet flexible fit. It boasts a tagless design and a seamless waistband that not only ensures a smooth profile under your hiking pants but also eliminates the chances of chafing or discomfort.
Breathability is another area where this underwear shines. Its fabric offers excellent moisture-wicking capabilities, ensuring that you stay dry and cool even in high-intensity hiking conditions.
The addition of a breathable and airy mesh panel enhances ventilation further, making the Patagonia Barely Hipster Brief an excellent choice for hikes during warmer weather.
The fabric is resistant to wear and tear, and it dries quickly – a handy feature when you’re out in the wilderness and need your underwear to dry overnight.
But the Patagonia Barely Hipster Brief is not just about functionality. It also scores high on style. The hipster cut is flattering and modern, and it comes in a variety of chic colours.
6. REI Co-op Lightweight Merino Bottoms
Crafted from 100% merino wool, the REI Co-op Lightweight Merino Bottoms not only offers superior softness but also excels in thermoregulation, keeping you warm in cooler conditions and cool in warmer climates.
Merino wool is renowned for its natural moisture-wicking properties, which keep you dry throughout your hiking journey, making these bottoms an excellent choice for both single and multi-day trips. This natural fabric also inhibits the growth of odour-causing bacteria, keeping you fresh even after multiple wears.
The REI Co-op Lightweight Merino Bottoms also boast an anti-chafing design. The flat seams minimize any potential friction against the skin. This feature, coupled with the tagless design, creates an underwear with an emphasis on comfort and reduced irritation.
While focusing on comfort and function, these Merino Bottoms do not compromise on style. The natural drape of the merino wool fabric ensures a flattering fit while the wide elastic waistband guarantees a secure and comfortable hold. Available in neutral tones, these bottoms can seamlessly blend with your existing hiking gear.
7. Ibex Women’s Natural Brief
What sets this option apart is its high merino wool content. Unlike traditional cotton underwear, merino wool regulates body temperature efficiently, dries out rapidly, and breathes exceptionally well. This makes the Ibex Women’s Natural Brief an ideal choice for both summer and winter adventures. The ultra-fine merino wool used in this underwear is incredibly soft, unlike traditional wool.
During extensive testing, the Ibex Women’s Natural Brief demonstrated commendable coverage with no instances of slipping. Even when wet, these briefs remain comfortable, making them an excellent choice for longer backpacking trips where comfort is important.
The merino wool wicks away moisture effectively, and thanks to its naturally antimicrobial properties, it ensures that odours are kept at bay. The Ibex Women’s Natural Brief also passes the durability test with flying colours, maintaining its shape even after multiple washes and rough use.
The elastic used is thinner but highly resilient, ensuring it neither digs into the skin nor stretches out over time. This blend of comfort, durability, and practicality makes the Ibex Women’s Natural Brief a worthy addition to this list of best women’s hiking underwear.
8. KÜHL Women’s Bikini
The KÜHL Bikini gets top marks when it comes to the best women’s hiking underwear, and for good reason. This underwear is designed with the active woman in mind, offering an unmatched combination of comfort, breathability, and durability.
One of its striking features is the thin mesh material, which provides superior breathability crucial for those hot and sweaty hikes. Despite being thin, they are incredibly durable, capable of withstanding long days on the trail without showing signs of wear and tear.
Fit is another area where the KÜHL Bikini shines. They stay in place throughout various activities, be it walking, biking, or yoga. This feature eliminates the need for constant readjustments, allowing you to focus on your adventure and not on your underwear.
The KÜHL Bikini comes in different styles, including hipster and thong, catering to varied preferences. Therefore, whether you’re a fan of the bikini style or prefer something different, you’ll find an option that suits your needs.
Factors to Consider When Choosing Your Hiking Underwear
When selecting the perfect pair of hiking underwear, there are several key factors to consider. Here are some tips to guide your choice and ensure maximum comfort on your hiking adventures.
- Material: The first thing to consider is the fabric. The best women’s hiking underwear is usually made from synthetic materials like nylon or polyester, or natural fibres like Merino wool. These materials are excellent at wicking moisture away from the body, keeping you dry and comfortable during your hike. Avoid cotton as it retains moisture and can lead to discomfort and chafing.
- Fit: Your hiking underwear should fit comfortably without being too tight or too loose. A good fit will reduce the risk of chafing and discomfort. Look for styles with flat or covered seams to further prevent any irritation.
- Breathability: Good hiking underwear should allow for air circulation to help regulate body temperature and keep you cool. This is especially important during strenuous hikes or in warmer weather.
- Quick-Drying: A pair of quick-drying underwear is essential, especially for multi-day hikes. This feature allows you to wash and dry your underwear overnight, keeping you fresh and ready for the next day’s adventure.
- Durability: Hiking underwear should be able to withstand the rigours of the trail. It should resist wear and tear and maintain its shape and comfort over time.
- Odour Resistance: Some materials, like Merino wool, have natural odour-resistant properties. This can be a beneficial feature, particularly on longer hikes where washing might not be an option every day.
- Ventilation: Hiking can be a sweaty affair, so look for underwear that offers proper ventilation to keep you cool and dry. Mesh panels or breathable fabric are excellent options for enhanced airflow.
- Anti-Chafing Properties: The repetitive motion of hiking can cause chafing, which can quickly turn your enjoyable hike into an uncomfortable ordeal. Look for hiking underwear with seamless designs or flatlock stitching to prevent chafing.
Remember, the best hiking underwear is the one that makes you feel comfortable and confident on the trail. Take the time to find the perfect pair, and your hiking experience will be all the better for it.
FAQ: Best Hiking Underwear For Women
Why is it important to invest in high-quality hiking underwear for women?
High-quality hiking underwear enhances comfort during your hikes by minimizing chaffing, managing moisture, and regulating temperature. Investing in such underwear ensures you can focus on the hike without discomfort or distractions.
What material is best for women’s hiking underwear?
Materials like Merino wool and synthetics are often recommended due to their moisture-wicking and odour-resistant properties. Merino wool, in particular, is excellent for temperature regulation, keeping you cool during strenuous activities and warm in colder weather.
What features should I look for in women’s hiking underwear?
Look for features like moisture-wicking, odour resistance, flat seams to prevent chafing, and lightweight design for comfort and easy packing.
How often should I replace my hiking underwear?
The lifespan of hiking underwear varies, but generally, it should be replaced when it starts losing its elasticity, when the material becomes thin, or when it no longer provides the same level of comfort and moisture-wicking.
Can I use regular underwear for hiking?
While you can use regular underwear, it may not provide the same level of comfort, temperature regulation, or moisture management that hiking-specific underwear offers. Investing in good-quality hiking underwear can significantly enhance the hiking experience. You can also opt for period-proof underwear that avoid leaks on long hikes.
Can I wear cotton underwear while hiking?
Cotton underwear is not typically recommended for hiking. While it might seem comfortable initially, cotton retains moisture, which can lead to chafing and discomfort during long hikes. It also lacks the temperature-regulating properties of materials like merino wool or synthetics, which are more suited to the changing physical demands and weather conditions encountered during hiking.
Are bamboo underwear good for hiking?
Bamboo underwear can be a good option for hiking due to its softness, breathability, and moisture-wicking properties. It is also naturally antibacterial, which can help to reduce odours. However, it may not perform as well in extremely cold or hot conditions compared to materials like merino wool or synthetics. Always consider the conditions of your hike when choosing your underwear.
What fabrics should you avoid when hiking?
When it comes to hiking, certain fabrics are less than ideal due to their properties. Cotton is a notable fabric you would want to avoid. While it’s comfortable for daily use, its moisture-retaining properties make it unsuitable for hiking, as it can cause chafing and discomfort during long treks. Cotton lacks the thermal properties provided by other fabrics like merino wool or synthetics, making it less effective in temperature regulation.
Denim is another fabric to avoid. It’s heavy, doesn’t dry quickly when it gets wet, and can cause severe chafing. Silk is also not recommended. It’s not durable and isn’t ideal for moisture management, despite its comfort. Lastly, avoid non-breathable synthetic fabrics as they can trap sweat and lead to overheating, especially during strenuous activities.
Should I wear long underwear when hiking?
Long underwear, also known as base layer bottoms or thermal underwear, can be an excellent choice for hiking in colder conditions, providing an extra layer of warmth. They help in maintaining your body temperature by insulating heat and wicking away moisture. However, in warmer weather or strenuous hikes, they might lead to overheating. Therefore, it’s crucial to consider the weather and your physical activity level while deciding on the type of hiking underwear.
How often should you change your underwear when backpacking?
The frequency of changing underwear during backpacking can depend on various factors including the duration of your trip, the weather conditions, and the amount of physical exertion. However, a common recommendation is to change your underwear daily for hygiene and comfort. If this is not feasible due to backpacking constraints, consider alternatives such as quick-drying, antimicrobial underwear that can dry quickly.
🤩 The Icebreaker Siren Bikini is the Best Women’s Hiking Underwear!
Final Thoughts: Best Women’s Underwear For Hiking
Choosing the best women’s hiking underwear can significantly impact your comfort and overall hiking experience. As mentioned already, features like material type, moisture-wicking capabilities, odour resistance, and a good fit are important in selecting the perfect pair.
Remember, the goal is to enjoy the journey, and the right underwear can help you achieve just that by preventing common discomforts like chafing and dampness. So, ladies, let’s prioritize our comfort on the trail and invest in high-quality hiking underwear.
Ready to gear up completely? Don’t miss my guides on the Best Women’s Hiking Hats and Best Women’s Hiking Shirts For Hot Weather to make your hiking experience even better.
About Rachael
Welcome to A City Girl Outside! I’m Rachael, a Londoner who traded the hustle and bustle of city life for the breathtaking beauty of Whistler, Canada. With no prior experience, I dove headfirst into an outdoor lifestyle that now includes hiking, canoeing, and snowshoeing.
What started as a leap into the unknown has become my greatest passion. These days, you’ll find me spending my weekends adventuring in the Canadian wilderness—chasing alpine views, paddling serene lakes, and embracing all that nature has to offer.
A City Girl Outside aims to inspire readers to step beyond their comfort zones, explore the great outdoors, and embrace the wild. Whether you’re a seasoned explorer or a complete beginner like I once was, there’s always room to reconnect with nature and discover the adventurer within.
