Moisture-Wicking Fabrics Explained: Activewear Buyer's Guide

"Moisture-wicking" is printed on almost every running top, singlet and pair of shorts you can buy. It is on budget gym tees and on race kit costing several times as much. So what does it actually mean, and what should you look for?

Here is what wicking fabric does, why cotton is a poor choice for running in Singapore, and how to read a product description before you buy.

Wicking at a Glance

What Wicking Fabric Does

Cleveland Clinic describes it simply: moisture-wicking fabrics pull sweat away from your skin to the outer surface of the shirt, where it can evaporate. They are also less likely to stick to your skin and rub.

That second point matters as much as the first. A wet shirt that clings and slides over your skin with every stride is how chafing starts.

Why Cotton Falls Short

The American Academy of Dermatology advises avoiding cotton when you exercise, because cotton soaks up sweat and moisture, which can lead to friction and chafing. A Cleveland Clinic family medicine doctor puts it more bluntly: cotton shirts are notorious for causing nipple irritation, especially as the shirt gets heavy and wet with sweat.

Cotton is fine for the walk to the coffee shop afterwards. For the run itself, leave it at home.

A shirt that stays light when it is wet is the one that does not rub.

Why It Matters in Singapore

Singapore's Meteorological Service describes the climate as high and uniform temperatures with high humidity all year round. Mean annual relative humidity is around 82%, and it often rises above 90% in the morning just before sunrise. That is exactly when most people run.

In air that humid, you sweat a lot and your kit will get wet whatever it is made of. The aim is a fabric that moves sweat off your skin, stays light, and does not cling.

How to Read a Product Description

Check the Fibre

Look for technical synthetic fibres such as polyester, usually with some spandex for stretch. If the description does not say what the fabric is, that is worth noticing.

Check the Weight

Lighter kit holds less sweat and feels less heavy when soaked. Some brands list the weight of each piece, which makes comparing easy. Nordic Tigon, for example, lists:

Check the Fit

Fit affects chafing as much as fabric does. Cleveland Clinic notes that tighter-fitting clothes are less likely to move and rub against your skin, and that a shirt that fits well, even a bit snug, can reduce the back-and-forth movement that leads to nipple chafing. Look for a close fit that does not dig in.

Check the Seams and Tags

Cleveland Clinic also suggests socks without seams and shirts without tags. If a seam or logo feels wrong when you try it on, it will feel worse after an hour of running.

Looking After Your Kit

• Follow the Care Label: Technical fabrics often come with specific washing instructions. They are worth reading once.
• Do Not Leave It in Your Bag: Wash or at least rinse damp kit soon after your run, rather than leaving it balled up overnight.
• Retire It When It Stops Working: If a top starts to cling or rub where it never used to, replace it before your next long run.

Train Cooler with Nordic Tigon on ATHLO+

Browse the full Nordic Tigon range on ATHLO+. Each product description lists the weight and the fabric, so you can compare before you buy.

Ready to put it together for a hot morning run? Read Running Clothes for Hot Weather next.