Moisture-Wicking Fabric, Explained: What It Is, How It Works and Which Materials Perform Best

Moisture-wicking fabric is engineered to move sweat away from your skin to the outer surface of the material, where it evaporates quickly. Wicking fabrics use capillary action, tiny channels between synthetic fibres that transport sweat outwards. The result: you stay drier, cooler and more comfortable during workouts.

Polyester is the most common wicking material and is the foundation of the Nike Dri-FIT clothing line. Here's how the science works, which fabrics perform best and how to care for your moisture-wicking gear.

• Using capillary action, moisture-wicking fabric pulls sweat from your skin to the outer surface, where it evaporates instead of soaking in.
• Polyester is the most popular moisture-wicking material. It's durable, lightweight, breathable and the basis of Nike Dri-FIT technology.
• Nylon offers stretch and breathability, polypropylene adds thermal insulation for cold-weather gear and merino wool wicks moisture while keeping you warm.
• Finer fibres create more micro-channels for sweat transport, which is why advanced synthetic fabrics outperform basic materials.
• Wash moisture-wicking tops inside out in cold water and skip the fabric softener to preserve performance.
• No-sweat fabrics like those found in Nike Universa apparel represent an evolution of moisture wicking in which sweat is absorbed and then evaporated so that it becomes less visible on the clothing.

Moisture-wicking fabric is any textile engineered to transport perspiration away from the skin to the outer surface of the garment, where it can evaporate. Wicking fabrics use a process called capillary action, whereby the synthetic fibres act as tiny channels that pull moisture outwards through surface tension.

Once the sweat reaches the exterior of the fabric, it spreads across a larger area and evaporates more quickly than it would sitting on your skin. This keeps you feeling dry, light and cool, even during high-intensity exercise.

This synthetic material is a go-to for moisture-wicking tops. And for good reason: it's durable, lightweight and breathable, notes Amie Dworecki, CEO and head coach of Running with Life. Polyester (or polyester blended with nylon or elastane) is a safe choice for a wide variety of workouts and environments. In fact, polyester is the foundation of the moisture-wicking Nike Dri-FIT clothing line.

Polypropylene is another top moisture-wicker. It's lightweight, yet it offers thermal properties, making it a great choice for cold-weather gear.

Nylon is a breathable synthetic material that stretches well for a comfortable fit, Dworecki says. These qualities make it another common pick for moisture-wicking tops. Like polyester, nylon (or nylon blended with other sweat-wicking materials) is a great option for most workout wear.

Wool is unique. It absorbs an incredible percentage of moisture for its weight, and yet, wool won't feel wet on your skin when you sweat. The explanation lies in the shape of the fibres. While other fabrics have smooth fibres that lie flat against your skin, wool fibres are naturally crimped. This crimping creates space between the fabric and your skin, which cuts back on that wet, heavy sensation you often feel from other natural fabrics.

Moisture-wicking technology isn't limited to T-shirts. The same capillary-action principles apply across your entire workout wardrobe.

• Wicking leggings and shorts keep your lower body dry during runs and training sessions.
• Moisture-wicking sports bras prevent chafing and discomfort during high-impact movement.
• Even socks benefit from wicking fabrics. Polyester and merino wool blends help keep feet dry, reducing the risk of blisters.

When building a workout outfit, look for Dri-FIT or similar wicking technology in every layer, from your base layer to your outermost piece.

Standard moisture-wicking fabric pulls sweat away from your skin, but you can still see wet marks on the outside of the garment. If you've ever wanted true no-sweat apparel—clothes that look dry while you're working hard—Nike Stealth Evaporation Technology delivers.

It uses a double-knit spacer construction with two different yarn treatments working together. The back yarn (closest to your skin) is hydrophilic, meaning it actively absorbs sweat and wicks it away from the body. The face yarn (the outer layer you see) is hydrophobic, allowing moisture vapour to pass through and evaporate while reducing the appearance of sweat on the garment's surface. The result: you stay dry and your clothes look dry, even during high-sweat training sessions.

For anyone searching for no-sweat workout clothes, Stealth Evaporation is the closest thing to it. You'll find the technology in Nike Universa tops, bras and leggings, built for strength and conditioning, HIIT and any other high-sweat workouts.