The ultimate guide to sauna apparel: the best fabric might surprise you

Guest post series continues. Please welcome Dori from Saunamekko, maker of eco-friendly sauna wear. Hello Dori!

Saunas have been around for centuries, but the way we enjoy them has evolved significantly in recent years. Public saunas are now more common than ever, particularly in urban areas, and mixed-gender sauna experiences are becoming increasingly popular. As sauna culture continues to develop, the question of what to wear has become somewhat more complex.

In this post, we’ll explore why some of the most common sauna outfits (yes, we’re looking at you, swimsuits) might not be the best choice. Plus, we’ll introduce the unsung hero of sauna apparel—a fabric that deserves more recognition for its exceptional qualities. And would it surprise you if we told you it’s wool? Yes, merino wool is found to be the best choice in the sauna and we’ll tell you why.

The Sauna Scene: How Clothing is Changing (And Why It’s a Big Deal)

Sauna culture is centered around relaxation, wellness, and detoxification, but what should you wear? In places like Finland and Germany, the historical answer has been simple: “nothing, of course.” The reasoning is that nudity allows for unimpeded sweating, which aids in the body’s natural detoxification process. In Russian banyas, bathers may wear a robe to and from the sauna, but they are typically nude while inside. In Turkish hammams, bathers generally wear a light woven towel called a pestemal, but it is worn loosely to promote freedom of movement and support the sweating process. In Japan, onsen and public baths have strict policies that actually prohibit swimwear, as it could interfere with the therapeutic benefits of the mineral-rich waters.

However, with the increasing popularity of mixed-gender saunas in modern times, traditional sauna practices have been affected across various cultures. As social norms evolve and saunas become more inclusive, the customs around sauna attire have shifted. While nudity remains customary in many traditional settings, the rise of mixed-gender spaces has led to a reconsideration of what is considered appropriate or comfortable to wear. In North America, for example, most public saunas require bathers to wear some form of clothing. Towels alone aren’t going to cut it, especially if you plan on heading for the cold plunge.

What to Wear in the Sauna and the Problem with Swimwear

So, what do most people wear when they hit the sauna? Well, swimwear is often the go-to choice. It’s something most of us have already in our closets and it’s what we’re used to in water-related environments. But when it comes to the sauna, swimwear isn’t quite made for the heat.

Most swimwear is made from synthetic materials like polyester, nylon, and spandex. While these materials are known for drying quickly, they also trap moisture against your skin rather than allowing it to evaporate. This results in that sticky, uncomfortable feeling as you sweat, which is exactly the opposite of what you want when you’re in a sauna aiming to relax and detoxify. Heat plus moisture against the skin also makes for an environment conducive to bacterial growth. Not to mention that some swimwear has metal parts that, when heated, can burn your skin.

There’s an even greater concern regarding synthetic fabrics: they shed microplastics. These tiny particles break off when exposed to heat, friction, or water. In the sauna, the heat causes these microplastics to degrade, turning them into airborne particles that can either be inhaled or settle on the skin. The issue doesn’t end there. When these microplastics come into contact with the skin, there is potential for absorption. This can be particularly alarming if the goal of your sauna session is to detoxify and promote wellness. The synthetic fibers used in swimsuits are also non-biodegradable, meaning they persist in landfills for hundreds of years, contributing to long-term environmental harm.

Sweat, Heat, and Your Body’s Natural Functions

In the sauna, your sweat glands are working overtime to cool down your body. Sweat is your body’s natural cooling mechanism. But wearing the wrong fabric can interfere with this process. If your clothes trap moisture, it sits against your skin, making you feel uncomfortable and overheated. For your skin’s natural cooling system to work effectively, you need fabrics that breathe and allow moisture to escape.

So, what’s the solution? Natural fabrics, of course! These fabrics are breathable, absorb moisture, and are far better for your body (and the environment) than their synthetic counterparts.

Why Merino Wool is the Ultimate Sauna Fabric

Here’s the good news: merino wool is here to save the day (or at least your sauna session!). This natural wonder fabric has some seriously cool benefits that make it perfect for the sauna.
Thermal Regulation: Merino wool acts like a personal temperature regulator. It helps keep you cool when you’re hot and warm when you’re cold. So, whether you’re in the intense heat of the sauna or stepping outside into the crisp air afterward, merino wool will ensure your body temperature is comfortably balanced. Its ability to adapt to your body’s needs makes it ideal for managing the fluctuating temperatures in the sauna.
Moisture-Wicking Magic: Merino wool can absorb up to 30% of its weight in moisture. Unlike synthetic fabrics, which can feel soggy and uncomfortable when damp, merino wool draws moisture away from the skin and keeps you feeling dry and comfortable. This moisture-wicking property is especially important in the sauna, as it prevents the uncomfortable sensation of clinging fabrics. Instead, your skin remains fresh, and the fabric stays breathable.
Bacteria? Not Today: One of the standout qualities of merino wool is its natural antimicrobial properties. Thanks to lanolin, a natural wax produced by merino sheep, merino wool resists the growth of bacteria and keeps odors at bay. This means that, unlike synthetic fabrics, merino wool doesn’t absorb body odor, making it perfect for repeat sauna sessions. You can enjoy your sauna time without worrying about the lingering smell or needing to wash your gear immediately after each use.
Odor-Resistant and Laundry-Friendly: Merino wool’s odor-resistant properties are a game-changer for frequent sauna-goers. Because it resists the buildup of odor-causing bacteria, you won’t need to wash your sauna apparel after every session. This is particularly useful for those who use the sauna regularly, as it reduces the frequency of laundry, saving time, water, and energy. It also extends the lifespan of your garments, so you won’t have to replace them as often.
Quick-Drying: Merino wool also dries quickly. After a sauna session, when you step out and prepare to continue with your day, you won’t be left feeling damp. Unlike cotton, which stays wet for hours, merino wool dries rapidly, allowing you to feel comfortable as you transition from the heat of the sauna to the outside world. This quick-drying quality is also helpful when traveling, as it prevents the inconvenience of packing a wet swimsuit.
Sustainability at Its Best: Merino wool is not only perfect for your sauna session, but it’s also kind to the planet. Unlike synthetic fabrics, which are made from petroleum-based resources and take hundreds of years to decompose, merino wool is renewable and biodegradable. Merino wool is a natural fiber that grows back every year, making it an eco-conscious choice. By opting for merino wool, you’re making a sustainable choice that helps reduce plastic waste and microplastic pollution.

Ok Great, So Where Does One Find this Magic Merino for the Sauna?

If you’re ready to experience the benefits of merino wool in the sauna, there’s one brand that’s leading the charge: Saunamekko. Saunamekko is the first and only apparel brand designed specifically for the sauna, using 100% merino wool to create comfortable, breathable, and eco-friendly sauna wear. Saunamekko has set a new standard for sauna apparel by focusing on the unique needs of sauna-goers. Whether you’re a sauna veteran or new to the practice, Saunamekko ensures you get the most out of your time in the heat, all with a sense of ease and comfort.

So, what have we learned? If you’re ready to upgrade your sauna game, consider making the switch to merino wool. Brands like Saunamekko offer high-quality, eco-friendly sauna wear made from 100% merino wool. So, you can relax, sweat, and stay comfortable without worrying about wardrobe malfunctions or sweat-soaked fabrics.

Sauna time should be all about relaxation and rejuvenation—so why not make your experience as comfortable and sustainable as possible?