Though more commonly associated with cozy knitwear, it turns out merino wool is actually a great choice for your undies. And did you know that it doesn’t only keep you warm in winter, but cool in the summer too?
Highly regarded for its exceptional qualities, the best merino wool underwear offers ultimate softness and breathability, while wicking away moisture and regulating temperature (just like a thermal shirt). Better yet, it’s naturally odor-resistant, eco-friendly, and sustainable. I mean, what’s not to love?
Whether you’re looking to try out a new type of underwear or you’re fully aboard the merino train, keep reading for the best boxers in the business. There’s options for every budget, plus styles to suit big guys and smaller frames alike.
If you’re looking for the best merino wool underwear, it’s your lucky day. I’ve managed to round up a selection of breathable boxers that’ll have you questioning why you didn’t consider them sooner. I’ll be taking you through a range of unmissable options, including MERIWOOL’s popular pair and a budget-friendly pick from Merino Protect.
Our Top Picks
Why it’s great: Made from all-natural ultra-fine merino wool, these boxer briefs are silky smooth, breathable, and quick-drying. Thanks to their snug fit, they’ll keep everything in place, while the odor-resistant properties help keep your privates fresh.
They’re perfect for every day but also make an excellent choice for your outdoor escapades—when you’re not wearing them, they can be hung to dry with the subtle yet convenient loop featured on the back of the waistband.
How it feels: Tight without feeling restrictive, they give the perfect amount of support. You’ll notice the softness as soon as you slip them on.
Flaws but not dealbreakers: These are sold as an individual pair, and they’re not exactly cheap. But once you’ve tried them, I’m confident you’ll be ordering another.
Sizes Available: S-XXL | Colors Available: 3 | Material: 100% Merino Wool | Style: Boxer Briefs
Why it’s great: Soft and itch-free, Merino Protect’s boxer briefs will soon become your daily go-to. They’re made from wool with a hint of stretch, making them durable, comfy, moisture-wicking, and odor-resistant. They promise not to chafe and the temperature control will ensure you remain happy in any weather.
How it feels: You’ll love these. Think of your favorite pair of underwear and then imagine if it was softer and lighter.
Flaws but not dealbreakers: If you’re looking for 100% merino wool, these come up a little short. They’ve been blended with nylon and spandex, which give them some extra stretch (and make them cheaper).
Sizes Available: S-XXL | Colors Available: 1 | Material: 84% Merino Wool, 12% Nylon, 4% Spandex | Style: Boxer Briefs
Why it’s great: There’ll be no need for ball powder when you’re wearing these boxers. The full merino construction makes them odor-resistant, moisture-wicking, and beautifully soft—giving you unbeatable comfort (and dryness) all year round. The brand’s one-year promise means your purchase is worry-free; if you’re not happy, they’ll replace them, no questions asked.
How it feels: With flatlock seams, zero tags, and double tough high-wear zones, they’re about as comfortable as you can get.
Flaws not dealbreakers: The boxer-style fit makes them a little looser than briefs or pouch underwear. Great if you like your bits to have more space, but not ideal if you require ultimate support.
Sizes Available: S-XL | Colors Available: 6 | Material: 100% Merino Wool | Style: Boxers
Why it’s great: A friend to your skin (more specifically your private parts), these boxer briefs are super lightweight, breathable, and odor-resistant. Excellent for every day and perfect for gym goers, they’ll keep your downstairs dry while keeping everything where it should be.
How it feels: I’m giving METARINO top marks for softness. The full merino wool construction means they’re hard to beat when it comes to comfort.
Flaws but not dealbreakers: As I mentioned, these are ultra-light, which can make them more prone to holes. Sizing also starts at medium, so check the size guide if you usually wear a small.
Sizes Available: M-XXXL | Colors Available: 5 | Material: 100% Merino Wool | Style: Boxer Briefs
Why it’s great: Designed to resist chafing, Smartwool’s temperature-regulating boxer briefs will keep you cool if you’re hot and bothered, but feel nice and warm once cold weather hits. You don’t have to worry about odor or wetness, as the merino construction transports moisture away from your skin before it has a chance to turn to sweat.
How it feels: You know what I’m going to say, right? There’s a bit of a recurring theme for the best merino wool underwear. It’s all soft. And this pair from Smartwool is no different.
Flaws but not dealbreakers: If, like me, you have skinny legs, they can start to feel a bit loose around the upper thigh area.
Sizes Available: S-XXL | Colors Available: 2 | Material: 53% Merino Wool, 39% Polyester, 8% Hemp | Style: Boxer Briefs
Why it’s great: Keeping you cool in summer and warm during winter, these merino boxer briefs are the perfect choice for outdoor explorers. Whether you’re climbing mountains or strolling through forests, you’ll be comfortable thanks to the snug fit and gentle support. And just as you’d expect from the best wool underwear, they’ll wick away sweat and keep odors at bay.
How it feels: The super fine and soft handle ensures all-day comfort, while the tag-free design allows you to move freely without itchiness.
Flaws but not dealbreakers: Some guys have complained about them coming up a tad small around the backside. So if you’re built like Kim K, be warned.
Sizes Available: S-XXL | Colors Available: 10+ | Material: 100% Merino Wool | Style: Boxer Briefs
Why it’s great: Designed for those that prefer a shorter, tighter fit when working up a sweat, First Lite’s boxer briefs come with a 4″ inseam and mesh vented panels to maximize ventilation. The Active Particle Technology exhausts moisture, while maintaining optimal core body temperature and fighting odors.
How it feels: Soft with ample stretch, I’m giving them 4.5 stars for comfort.
Flaws but not deal breakers: As I’ve already said, these do come up short (and they’re meant to be that way). If you prefer boxers that are longer in the leg, you’ll need to try another pair.
Sizes Available: S-XXL | Colors Available: 3 | Material: 65% Merino Wool, 33% Nylon, 2% Spandex | Style: Boxer Briefs
Why it’s great: Ideal for guys on their travels, these briefs are ultra lightweight, breathable, odor-resistant, and durable. They also regulate body temperature (keeping you cool in summer and warm in winter) and dry quickly, which comes in particularly handy if you need to wash them in a rush.
How it feels: Thinner and softer than regular wool, these merino briefs are soft on the skin with an added windproof panel for increased protection.
Flaws but not dealbreakers: Tighty whities aren’t everyone’s cup of tea, so the fit might feel too tight if you prefer boxers.
Sizes Available: M-XXL | Colors Available: 2 | Material: 56% Merino Wool, 44% Polyester | Style: Briefs
Buying Considerations for The Best Merino Wool Underwear
The color of the underwear you choose will largely depend on personal preference. However, for everyday wear and versatility, neutral colors like black, gray, and navy are popular choices as they tend to blend well with most clothing. They’re also less likely to show any stains or accidents (it happens to the best of us).
Ensure your underwear fits well and matches your preferred style, whether that’s boxer briefs, trunks, or another version. A comfortable and properly fitting pair will prevent chafing and discomfort during prolonged wear. Pay attention to features like waistbands and leg openings to ensure they are comfortable and stay in place.
Look for reputable brands known for their quality and craftsmanship. Quality merino wool underwear will last longer and maintain its performance properties over time. Read reviews and consider the brand’s reputation for customer satisfaction and durability when making your selection.
Why You Should Trust Us
Buying underwear is quite a personal choice, but we all require a helping hand every now and again. To find the best merino wool underwear, I’ve delved deep into the world of boxers, briefs, and trunks, to source the finest undies around. And while I’d love to take all the credit, I did get a little help from hundreds of reviews left by guys who have been wearing them for years.
Whether you’re an outdoor enthusiast, athlete, or simply someone who appreciates finer quality clothes, investing in the best merino wool underwear may just be your smartest sartorial move yet.
For ultimate comfort, durability, and performance, MERIWOOL’s boxer briefs are a fine choice. Offering a natural solution to moisture management (no ball deodorant required), odor control, and temperature regulation, they’re the ideal option for guys seeking the best in functionality and comfort.
Merino wool underwear is a great choice for your top drawer. It’s loved for its softness, moisture-wicking properties, natural temperature regulation, odor-resistance, and overall comfort—making it particularly popular for outdoor activities and travel.
Yes, merino wool is an excellent option for boxer briefs. Its softness, moisture-wicking abilities, natural temperature regulation, and odor-resistance make it a comfortable and practical choice for underwear.