Heat, perspiration and friction: How to choose cycling shorts that really protect?
Summer, the worst enemy of chafing when running
The good weather is back, the temperatures are rising... and with them, the risks of chafing and irritation are skyrocketing. Every runner or trail runner has already experienced that burning skin sensation due to the constant rubbing of the thighs , making the end of the race unbearable .
Moisture and sweat make the problem worse: clothes stick, skin becomes more sensitive, and irritation occurs even more quickly. So how do you choose cycling shorts that truly protect against chafing and allow you to run freely?
In this article, we decipher the essential criteria for good anti-chafing shorts , so that you can run without discomfort, even in 30°C!
Personally, I remember a "short" 25km run in the sun, pulling down my shorts every 5 minutes and counting the remaining kilometers because my thighs were rubbing against each other. One of the worst running sensations I've ever had, and yet I didn't have any rashes. That means worse is possible. Anyway...
1️⃣ Why do heat and perspiration make chafing worse?
🔹 Humidity accentuates the heating phenomenon
When the skin is wet (perspiration, rain, ambient humidity), rubbing becomes more aggressive . This can lead to redness and burning in sensitive areas.
🔹 Unsuitable materials amplify discomfort
Some fabrics retain moisture instead of wicking it away, creating a "mop" effect (we couldn't find anything more chic for the image 😅) which worsens friction.
🔹 Improper fit of the shorts can worsen irritations
Bib shorts that are too tight compress and rub more . Bib shorts that are too loose move too much, ride up and cause irritation .
What you need to remember:
✔️ Moisture + friction = perfect combo for irritation.
✔️ Unsuitable fabric traps perspiration and worsens discomfort.
✔️ Ill-fitting bib shorts can cause just as many problems as bad shorts.
2️⃣ The key features of anti-chafing shorts
1. A suitable length to avoid skin-to-skin contact
✅ Good cycling shorts should cover the inside of the thighs to avoid direct friction of the skin .
✅ Too short, it doesn't protect enough. Too long, it can be uncomfortable.
2. Breathable and quick-drying fabric
✅ Choose technical materials that quickly wick away perspiration .
✅ Polyester and elastane are perfect for a good balance between breathability and elasticity .
3. Flat seams to prevent irritation
✅ Conventional seams can create additional areas of friction .
✅ A quality pair of shorts should have flat seams, intelligently positioned and discreet for maximum comfort.
What you need to remember:
✔️ Well-designed cycling shorts protect against chafing without hindering your stride.
✔️ It should be lightweight, breathable and well-fitting to provide a second-skin feel.
✔️ Flat seams make all the difference over long distances.
3️⃣ Tips to avoid irritation in summer
Even with the right equipment, some best practices can make a difference:
1. Apply anti-chafing cream before each outing
✅ An anti-friction balm can prevent irritation before it starts .
2. Check the fit of the shorts
✅ Neither too tight nor too loose: it must follow the movements without compressing .
3. Wash your shorts after each ride
✅ A dirty or sweat-saturated fabric becomes rough and loses breathability .
What you need to remember:
✔️ Preparing your skin before running reduces the risk of chafing.
✔️ A good fit is essential for comfort.
✔️ Well-maintained bib shorts retain their technical properties for longer.
Bib shorts, the comfort ally of trail runners in summer
When it's hot, the right bib shorts can make all the difference between a smooth ride and chafing. By the way, we're talking about bib shorts, not flowing shorts (which are the worst enemy of chafing thighs, in our opinion). By choosing a well-designed, well-fitting pair, you can say goodbye to chafing and fully enjoy your runs.
At TwoSixOne , we have designed a pair of shorts that are 100% designed for the comfort of trail runners , with an ideal length, breathable technical fabric, anti-friction patches on the inside of the thighs and zero annoying seams .
