How to adapt your running gear to the temperature?

Running apparel: an often underestimated performance lever

We often talk about training or nutrition, but running apparel plays a key role in your performance. However, if you are poorly dressed, you will run less effectively, struggle with sweat, catch a cold, or overheat. The right outfit is one you forget the moment you put it on. At Aerth, that is precisely our obsession: pieces that perform as well as they are pleasing to wear.

So, how do you adapt your outfit to different temperatures?

Running year-round means accepting a simple reality: there is no such thing as a universal running outfit.

Between a summer run at 28°C and a winter jog at 5°C, the body does not react in the same way. And yet, many runners continue to wear the same clothes… at the expense of their comfort and performance.

Whether you choose men's running shorts, a women's running t-shirt, or running pants, each piece must serve a specific purpose: regulating body temperature, wicking away sweat, and supporting movement.

Why is running attire essential for performance?

During exercise, your body generates heat. To prevent overheating, it perspires.
The role of your running clothes is to wick away this sweat (breathability), dry quickly (moisture-wicking), and provide protection without being stifling (thermoregulation).

Poor equipment can lead to:

• a feeling of heaviness (damp fabric)
• chafing
• energy loss due to poor thermal regulation

This is where high-end sportswear makes the difference: it is designed to support your effort, not hinder it.

Running in high heat (above 25°C)

Above 25°C, the priority is simple: vent heat, stay dry, and avoid feeling restricted by your clothing. This is exactly why Aerth developed the Varsitech Tee, a running t-shirt made from 100% recycled polyester that is breathable and ultra-light. For bottoms, the Track Series Short is running shorts tailored from an Italian laser-micro-perforated material, composed of 73% polyamide and 27% elastane. Fully four-way stretch, it features a phone pocket and a key pocket in the back—the only two essential pieces of equipment for a city run. For hotter days, the Aeroteam Tank completes the range with a running tank top designed for total freedom of movement and reflective details for late-day runs.

Expert advice: avoid cotton, as it retains moisture and increases the sensation of heat.

Running in temperate weather (10°C to 20°C)

This is the most "tricky" zone. You are often cold at the start… then too hot after 10 minutes. Below 20°C, a material that is too cold at the start or too hot during exertion can ruin an entire workout.
Aerth designed the Streamracer top to meet this exact challenge. A long-sleeve running t-shirt that supports your runs in slightly cool weather as well as your indoor warm-ups. Its Italian fabric, structured by finely drawn ribbing, reveals a certain elegance. The Running Club logo is featured on the chest with understated sobriety. It is the perfect running top for your mid-season runs. It won't be too warm, nor too light.

Running in cold weather (below 10°C)

Below 10°C, or for days with unpredictable weather, Aerth offers two options for running jackets depending on your needs. The Signature Jacket, a jacket tailored from Superbiflex, offers 4-way stretch and a comfort close to a second skin. Ideal for warm-ups or easy runs. For training in changing conditions, the Motion Jacket (running jacket) takes over: ultra-light, water-repellent, four-way stretch, and wrinkle-resistant, it slips into a bag pocket and is only noticed when you need it.

The ideal outfit is:

1. Base layer: a technical running t-shirt such as the Aeroteam Tee
2. Outer layer: a windbreaker jacket
3. Running pants: Aerth's ultra-sensory Running Pant will perfectly meet your needs.

In any season: the Signature Tee, a must-have piece

There is one piece at Aerth that transcends seasons and conditions: the Signature Tee. A best-seller in the collection for good reason, this running t-shirt features a silky micro-piqué fabric (93% polyester, 7% elastane); its tailored fit and half-zip collar for ventilation management during exertion make it the ultimate running companion. Understated in its colors (Midnight Sky, Lunar White, Alpha Green...), it embodies the Aerth philosophy better than any other piece: Tailored Performance, the rigor of tailoring applied to sportswear.

Conclusion: run better, not just run

Choosing your clothing is also a matter of style and enjoyment.

Investing in well-designed running clothes, especially high-end sportswear, allows you to:

• better regulate your effort
• avoid injuries
• fully enjoy every run

And ultimately, that is the goal: run long, run well, run freely.