Moisture-wicking fabrics: Which ones should you choose, and how?

You know that feeling of a soaked fabric sticking between your shoulder blades even before you look down. The T-shirt clings to your skin, air can’t circulate, and the coolness promised that morning has turned into a lukewarm compress. Sweating isn’t the problem—it’s a vital bodily function. The problem is the fabric that traps it instead of wicking it away.

Sweating is the body’s primary cooling mechanism when it’s hot. And it’s not the sweat itself that cools you down—it’s its evaporation: every gram of evaporated sweat carries away about 2.4 kJ of heat, to the point that evaporating about 125 g is enough to lower your core temperature by one degree. A fabric that blocks this evaporation leaves you wet, weighed down, and quickly overheated.

An anti-sweat fabric, on the other hand, keeps the skin dry so the natural cooling mechanism can do its job. Here’s how to recognize the right fabrics—and which ones actually deliver on their promise

Absorbing isn’t the same as wicking away: the true promise of an anti-sweat fabric

A good moisture-wicking fabric must accomplish three things at once. Each corresponds to a specific physical property, not a marketing claim.

• Prevent overheating: Keep the body within its comfort zone to minimize the onset of sweating.
• Wicking away moisture: quickly moving sweat away from the skin to the outside of the garment to keep the skin dry.
• Reducing odors: not trapping the bacteria that break down sweat and sebum, which cause unpleasant odors.

The confusion stems from one word: absorb. A material that absorbs a lot of water isn’t necessarily one that keeps the skin dry. It all comes down to where the water is stored. In a hydrophilic fiber like cotton, water penetrates inside the fiber and stays there: the fabric swells, becomes saturated near the skin, and takes a long time to dry. In a technical fabric, water flows through the micro-channels between the fibers, not within the fiber itself. This is what engineers call wicking, or capillarity: tiny channels transport sweat from the skin to the outer surface of the garment, where it spreads over a large area and evaporates quickly. The skin, meanwhile, remains in contact with fibers that have stayed dry.

It is this distinction that sets a simple breathable fabric apart from a true moisture-wicking fabric. The former allows air to pass through, but evaporation still occurs at the skin’s surface. The latter actively manages moisture and heat by moving water away. The four G-Heat technologies belong to this second category, each with its own method.

See also: Breathable T-shirt vs. cooling T-shirt: Which one should you choose for summer running?

Cotton: The False Friend That Keeps You Wet

Cotton starts out with a good reputation: natural, soft, affordable. On paper, it checks the “absorbs sweat” box. In practice, that’s exactly where the trap snaps shut as soon as you start moving.

Cotton is a hydrophilic fiber: it soaks up water and stores it inside its fibers. It’s breathable, but it doesn’t wick moisture away: it doesn’t effectively transport moisture to the outside. Once saturated with sweat, it dries very slowly—much more slowly than wool or technical fibers. The fabric stays wet, sticks to your skin, and blocks airflow. But evaporation requires circulating air that isn’t yet saturated with vapor. Soaked, clinging cotton creates exactly the opposite effect: a layer of humid, nearly saturated air against the skin. Direct evaporation slows down, and the feeling of coolness disappears, replaced by a cold, sticky compress.

It’s even worse when it comes to odors. By trapping sweat and moisture in its fibers, cotton provides a breeding ground for bacteria that break down sweat and sebum. The garment eventually starts to smell, even after moderate exposure. For a leisurely, effortless stroll in the shade, a cotton T-shirt remains comfortable. But as soon as you pick up the pace, as soon as the heat rises, it becomes a hindrance.

Cotton isn’t the only culprit, though. We often hear that all you need to do is choose natural fabrics to stay cool: linen, wool, and even merino wool are known for their thermoregulatory properties, while traditional synthetic fibers like polyester or viscose are said to solve all drying issues. The reality is more nuanced. Natural fibers offer good moisture absorption but don’t always wick moisture away quickly, and standard synthetics, while they dry fast, trap unpleasant odors. None of these generic materials were originally designed to keep the skin dry during exercise. The best sportswear fabrics don’t rely on a single fiber—they’re designed as a system. This is precisely where G-Heat has taken a different approach.

The goal, therefore, isn’t to absorb as much as possible, but to keep the skin dry for as long as possible. Four technologies, four solutions.

TechCool™: the dry-weave technology that harnesses your sweat

A final sprint at the end of a run. Your heart rate spikes, the back of your neck gets warm, and yet your T-shirt stays dry to the touch. That’s the promise of TechCool™ fabric—the ideal technology when your goal is to stay dry without having to do anything.

The principle: a patented three-layer fabric structure that works with sweat instead of against it. The inner, water-repellent layer draws moisture away from the skin; a capillary system distributes it throughout the fabric; and the outer weave slows evaporation to prolong the cooling effect. This is the very essence of wicking, taken to its fullest potential: moisture never pools against the skin; instead, it’s transported outward and then evaporated over a wide surface area. All of this happens while you’re dry: no need to wet the garment—it activates on its own as soon as you start sweating. Just put it on, and that’s it.

The TechCool™ men’s cooling sports T-shirt perfectly illustrates how this works: a lightweight fabric made of 86% polyester and 14% spandex, with mesh panels under the arms for ventilation and a fitted cut that moves with you. The women’s TechCool™ cooling sports T-shirt follows the same design philosophy with a feminine cut. With a Qmax of 0.22—more than double that of cotton—body heat is quickly wicked away, and your skin stays dry continuously as long as you’re wearing the garment. This is the core of the cooling T-shirt line.

To complete the outfit, the TechCool™ men’s cooling sports shorts use the same lightweight, stretchy fabric on the lower body, just like the entire line of cooling shorts. And for the most exposed part of the face, the TechCool™ cooling sports headband wicks sweat away from the forehead while keeping the skin dry—a detail that makes all the difference on a long run.

Learn more: Sports and Heat Waves: How to Keep Training Safely?

JadeCool™: Instant Cooling with Jade

Some days are just brutal. With the thermometer reading 35°C, the sun beating down, and a craving for instant refreshment rather than gradual cooling, that’s where JadeCool™ comes in.

This technology infuses micro-crystals of jade directly into the fabric. Upon contact with moisture—whether water or sweat—the jade accelerates the evaporation of body heat and creates an immediate cooling sensation. The brand’s signature: a cooling sensation felt within seconds of activation. The process is simple: soak, wring out, shake, and put on.

Beyond the cooling effect, JadeCool™ also offers sun protection: the fabric is UPF 50+ and filters out more than 98% of UV rays thanks to its dense weave. The men’s JadeCool™ cooling UV-protective T-shirt thus combines a cooling sensation with UV protection, making it ideal for a day outdoors, whether in the city or with the family. JadeCool™ is also featured in a number of cooling accessories. It is the ultimate versatile technology, one that addresses the most common need: feeling hot, wanting instant relief, and keeping things simple.

Its Qmax of 0.18 already places it well above cotton. The difference lies in the intended use: while TechCool™ works continuously and in a dry state, JadeCool™ delivers an immediate burst of coolness, to be re-moistened when the effect wears off. Two complementary solutions to the same heat.

PolyCool™: Long-Lasting Coolness for Static Exposure

A whole day in the sun, with no chance to change clothes or retreat to the shade. A picnic that drags on, an outdoor workstation, a match that goes on and on. Here, it’s not immediate coolness that matters—it’s the duration. And that’s where PolyCool™ comes in.

The technology relies on super-absorbent polymer fibers—the same family of materials capable of storing several hundred times their weight in water. Once soaked and wrung out, the fabric forms an internal water reservoir that it slowly releases through gradual evaporation: the cooling effect is spread out and prolonged for several hours, rather than wearing off in a few minutes like a simple wet cloth. This is the solution for long, static activities, when you can’t re-activate the garment every half hour. Here’s how: submerge, gently wring out, remove excess water, and put it on.

The PolyCool™ cooling sports cap is a great example of this use: it protects the head—the most exposed area—with long-lasting coolness, just like the rest of the cooling caps and hats. For professional use, the PolyCool™ gray cooling vest provides the same lasting coolness for the torso, which is useful in work environments or on construction sites exposed to heat. This is the principle shared by the entire line of cooling vests. In fact, the INRS explicitly recommends cooling gear—including vests and towels—as part of measures to combat heat stress in the workplace.

PolyCool™ isn’t measured by the Qmax index: its mechanism relies on the absorption and evaporation of water, not on heat transfer upon initial contact. Its strength lies not in immediacy, but in consistency. A word of caution: never wring out the garment, as this damages the super-absorbent fibers.

PhaseCool™: precise, dry cooling without moisture

There are situations where getting a garment wet isn’t an option: a clean environment, a demanding setting, or a dress code. That’s where PhaseCool™ really shines, with an approach that’s radically different from the other three.

This technology uses a phase-change material (PCM). The principle is based on latent heat: when a material melts, it absorbs a large amount of energy while remaining at a nearly constant temperature. Microencapsulated within the fabric, this material transitions from a solid to a liquid state as soon as the microclimate between the skin and the garment exceeds a specific threshold (21°C or 28°C, depending on the version). As it melts, it absorbs excess heat from the skin instead of letting the temperature rise: it acts as a thermal battery that smooths out heat spikes. And when the environment cools down, it solidifies again and releases the stored energy. All of this without a drop of moisture.

It offers the most intense cooling in the line: its Qmax of 0.38 is the highest among our four technologies. And most importantly, it provides dry, invisible, and precise cooling. The EVO PhaseCool™ cooling sleeves feature this technology: they slip over the forearms and regulate temperature on contact, without requiring water activation. They lead the way in the cooling sleeves lineup. To recharge them, simply place them in an environment below their melting point. A solution designed for prolonged outdoor exertion or environments where moisture is prohibited.

PhaseCool™ thus rounds out the lineup: while TechCool™ focuses on dry simplicity, JadeCool™ on an instant cooling sensation, and PolyCool™ on longevity, PhaseCool™ delivers thermal precision and is completely moisture-free.

How do the four technologies handle sweat?

Each technology handles sweat in its own way. This table summarizes how they respond to sweat, so you can choose based on your actual needs.

These four fabrics have one thing in common: they can all be reactivated an infinite number of times and offer UV protection (UPF 50+ fabric). Where cotton leaves you feeling wet, they keep your skin dry—each in its own way.

Don’t miss: How does our body regulate its temperature in the summer?

Why is dry skin even more important when the air is humid?

There’s one scenario where fabric choice becomes crucial: humid air. When humidity rises, the air approaches water vapor saturation. Above 90%, sweat evaporation becomes nearly impossible: sweat accumulates and runs down your skin, but no longer cools you down. This is why the same temperature of 30°C is easily tolerable in dry air but becomes unbearable in humid air—the famous “feels-like temperature.”

Under these conditions, a soaked cotton cloth makes everything worse: it traps a layer of saturated air against the skin and prevents what little evaporation is still possible. A fabric that keeps the skin dry does the opposite: it draws moisture away from the skin and shifts evaporation to the surface of the garment, where ventilation is better. It doesn’t eliminate the physical strain of humid air, but it maximizes every gram of sweat that actually manages to evaporate. The logic is simple: the faster sweat leaves the skin, the faster cooling becomes effective again.

Which moisture-wicking fabric is right for your needs?

There’s no such thing as the “best” fabric in absolute terms. There is, however, the best fabric for your specific situation. Here’s how to decide quickly.

1. If you exercise and sweat naturally: opt for a quick-drying fabric that requires no special care. A TechCool™ cooling sports T-shirt for women—or its men’s version—activates on its own and keeps your skin dry during exercise.
2. Looking for a way to stay cool with your family in the heat: jade provides immediate cooling and sun protection. The JadeCool™ Anti-UV T-shirt checks both boxes.
3. If you’ll be exposed to the sun for a long time without moving: go for endurance. The PolyCool™ sports cap lasts for several hours without needing to be reactivated.
4. Want to stay cool without getting your clothes wet? The EVO PhaseCool™ wristbands precisely regulate temperature while staying dry.

An effective sweat-wicking T-shirt shouldn’t be chosen at random, but based on the intensity of your activity, duration of exposure, and humidity levels. It’s this practical approach that sets a technical line apart from a simple assortment of colors.

How do you care for moisture-wicking fabric?

Technical fabric retains its properties over time as long as it is washed correctly. The steps are simple but essential, as improper care negates the moisture-wicking benefits.

• Use a mild detergent, without fabric softener: fabric softener clogs the micro-channels in the fibers and blocks moisture wicking.
• Wash at a low temperature (30°C), preferably by hand or in the washing machine on a gentle spin cycle.
• Air-dry—never use a dryer—and do not iron.
• Do not store the garment while damp to prevent mold and odors.

When properly cared for, our fabrics can be reactivated indefinitely: their breathability doesn’t wear out—it’s revitalized. This is also what makes them cost-effective over time, unlike clothing that deteriorates with each wash.

Why choose G-Heat?

Since 2017, G-Heat has been designing clothing and accessories to keep you active, no matter the weather. The brand hasn’t sought to reinvent cotton or randomly layer fibers: it has developed four distinct technologies, each lab-tested, to address real-world heat conditions.

This evidence-based approach, using measured metrics like Qmax, sets G-Heat apart from generic claims. A moisture-wicking fabric is only useful if it truly keeps the skin dry. Our four fabric families—from TechCool™ dry-weave to PhaseCool™ phase-change technology—are designed with this single goal in mind.

“A sweat-wicking fabric shouldn’t absorb sweat and trap it; it should wick it away to keep you dry. That’s the difference between suffering through the heat and keeping moving. We don’t have four technologies by chance: every situation deserves the right solution. ”

— Édouard Castaignet, Founder of G-Heat

Whether you’re heading out for a workout, a family day, or a job in the open, the key is to be properly equipped. The complete line of cooling apparel combines these four technologies to help you tackle the heat without ever suffering from it.

Conclusion: Keep your skin dry, no matter how hot it gets

A good moisture-wicking fabric isn’t judged by how much it absorbs, but by its ability to keep you dry for as long as possible. Cotton traps moisture and clings to the skin; the four G-Heat technologies, on the other hand, wick away sweat or provide genuine cooling, each designed for a specific situation. It’s up to you to choose the right one for your day: TechCool™ dry-weave for exercise, JadeCool™ for a cooling effect, PolyCool™ for prolonged static exposure, and PhaseCool™ for precision without moisture.

Whatever the weather. G-Heat, in all weather conditions.

FAQ: Sweat-Wicking Fabrics and Dry Skin

Which fabric truly keeps your skin dry when you sweat?

A fabric that wicks moisture away through capillary action, not one that absorbs it and traps it. Technical technologies like TechCool™ transport sweat to the outside of the garment, where it evaporates, leaving the skin dry. Cotton, on the other hand, traps sweat in its fibers and takes a long time to dry.

Is cotton a good fabric for managing sweat?

No, not during physical exertion or in intense heat. Cotton is hydrophilic: it absorbs a lot of moisture but dries slowly, clings to the skin, blocks airflow, and traps odors. It’s acceptable when resting in the shade, but becomes a hindrance as soon as you start moving more vigorously.

Do you have to wet a cooling garment for it to work?

It depends on the technology. TechCool™ and PhaseCool™ activate when dry, without water: just put them on. JadeCool™ and PolyCool™ require activation with water (soak and wring out) to release the cooling effect.

What’s the difference between a breathable fabric and a moisture-wicking fabric?

A breathable fabric simply allows air to pass through. A moisture-wicking fabric actively manages moisture and heat: it wicks away sweat to keep the skin dry and, in the case of G-Heat technologies, adds a measurable cooling effect.

Does a technical fabric prevent sweat odors?

For the most part. By quickly wicking away moisture instead of trapping it, a technical fabric limits the damp environment where odor-causing bacteria thrive, unlike cotton, which traps sweat in its fibers.

How do you wash a sweat-wicking T-shirt without damaging it?

Wash at 30°C, without fabric softener (it clogs the fibers), and use a low spin cycle. Air-dry; do not tumble dry or iron. When properly cared for, these fabrics retain their performance indefinitely.

Which technology should you choose for summer sports?

For activities where you naturally sweat, the TechCool™ dry-weave fabric is best suited: it activates on its own, keeps the skin dry at all times, and requires no special care, as found in cooling sports T-shirts and shorts.

Sources and References

[1] “Heat and Thermoregulation, Inserm Magazine No. 61”, INSERM

[2] “Excessive Sweating (Hyperhidrosis)”, Vidal

[3] “Extreme Heat and Heat Waves”, Santé Publique France

[4] “Working in the Heat: What You Need to Know”, INRS

[5] “Heat and Health”, World Health Organization

[6] “Extreme Heat and Heat Waves: Best Practices”, ANSES

About the author

Romane Benderradji - Communications Manager and Spokesperson at G-Heat

From the icy slopes of Avoriaz to the scorching beaches of Australia, not to mention surfing sessions on the Landes coast, I have personally experienced extreme temperatures. This experience feeds into every piece of content I create at G-Heat.

My role? To translate seven years of innovation and my expertise in thermoregulation into concrete solutions for you. I break down our thermal innovations so that you can find THE solution that fits your everyday life. Because behind every G-Heat product, there is a real consideration of your actual needs, your constraints, and above all, your desire for adventure.

With hundreds of thousands of customers supported around the world, believe me, we have a few stories to tell! Enjoy reading.

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