My Cart


What is Chafing?

Posted on

What is chafing?

Chafing is a friction-induced skin injury where the outer layer of skin (epidermis) is rubbed creating microscopic tears, exposing the skin layer below (dermis), which becomes red, raw and irritated.

Runners are more susceptible to chafing, along with other endurance athletes, due to repetitive movement, generated through skin-to-skin or clothing-to-skin contact of multiple body parts, combined with sweat.   Chafing causes an extremely painful burning feeling, particularly during your post-run shower!

 What causes chafing?

 Chafing is exacerbated by:

  • Moisture

Excess moisture from sweating, water sports such as a triathlon swim or damp weather conditions will increase the likelihood of chafing.  Salt residue from perspiration or seawater will aggravate the situation, acting like sandpaper, grinding and irritating the skin.

  •  Poor-fitting clothing

Clothing that is too baggy or tight including socks will rub and make you more susceptible to chafing. Proper-fitting, moisture-wicking clothing that is ergonomically designed to move with you will prevent chafing and ensure you enjoy a comfortable run.

  • Clothing with bulky seams

Clothing with thick seams will aggravate chafing.  Choose clothing that is seamless or has flat seams in the areas that are prone to chafing.

  • Clothing that prevents skin from ‘breathing’

Some clothing material, such as cotton, is more likely to hold sweat and moisture next to the skin, causing chafing. Choose clothing that is made of moisture-wicking fabric, which transports moisture away from the skin and is created using mesh panels for increased breathability.

  • Dehydration

If you are dehydrated, your body is unable to flush salts away from your skin as easily.  Drink lots of water before, during, and after exercise, allowing you to perspire freely so the perspiration doesn't dry into salt crystals that can enhance the chafing.  


Runderwear – chafe-free guaranteed!


Runderwear performance clothing comes with a chafe-free guarantee.


Runderwear’s award-winning range of chafe-free clothing is:


Seamless design

Most Runderwear clothing is seamless to prevent rubbing and chafing.  Where seams are vital within the design, seams have flatlock edging, again to minimise skin rubbing.


All Runderwear clothing is created using mesh panels of micro-perforations to control air-flow, increasing breathability of the skin, maximising comfort and enhancing the lightweight, moisture-wicking properties of the fabric.

Moisture wicking

All Runderwear clothing is made using technical moisture-wicking Polyamide fabric, a highly effective material, which transports moisture away from the skin, preventing chafing mile after mile.

Ergonomically designed for ultimate comfort

All Runderwear clothing is ergonomically designed to fit your body shape and move with you, providing the ultimate in comfort.  Runderwear also contains high-grade Elastane to ensure your clothing continues to fit properly, even when hot weather causes swelling. 


All Runderwear clothing is designed to be lightweight.  Running in the heat increases exertion levels, so you want to remain as light as possible to retain fluid and energy. Many people consider the weight of their trainers, but choosing clothing made from a lightweight fabric for underwear, socks, shorts and base layers can really make a difference.


Top Tip - And remember as well as wearing your Runderwear, make sure you are drinking plenty of water, especially in the heat, to minimise chafing.

Enter your email below to get 10% off your first order

You’ll receive an email - click confirm (takes 2.2 seconds) and you’ll receive your code.

No email? Contact us at

performance underwear
★ Read Our Reviews

Let customers speak for us

89 reviews
Runderwear Long Boxer

Excellent product

The Anti Blister Low-Rise Running Sock

Best Socks for Trail Running

Wore a pair during Oman Desert Marathon, only changing to a clean pair on day 5. No excessive sweating (even with the double layer) and no blister even after wearing them for almost 100km in very hot (above 40C) running condition and soft sand.
Also that double-layer gives an extra cushioning making them very comfortable for long runs on rocky trails.

Awesome Base Layer recommended for training in fresh to very cold environment

Tested the baselayer while running for 4 hours by -10C with only 1 extra layer to protect me from the wind and it kept me warm all the way. I also like to wear it for my early morning running session in the fresh Dubai winter and I don't feel to warm as it is very breathable and wicks moisture.

Perfect Baselayer

Garment material is flawless and keeps ur body warm in cold morning runs. Fit is also as per normal standards. A perfect addition to my running gear.