Best sports underwear: why good exercise starts with the basics

Good sportswear often gets a lot of attention. Running shoes, sports T-shirts and training pants are carefully chosen, but one item is often overlooked: sports underwear.

Yet this exact layer has a huge impact on your comfort during exercise. The wrong underwear can cause chafing, excessive sweating and distraction during your workout. The right sports underwear, on the other hand, moves with your body, keeps you dry and lets you focus on what really matters.

But what actually are the best sports underwear? And what should good sports underwear really deliver?

In this blog, you’ll discover everything you need to know about underwear for athletic performance.

Why is sports underwear so important?

During exercise, a lot happens in your body. Your temperature rises, you sweat more and you move more intensely than usual. This means your underwear is put under far more stress than during an average workday.

Regular underwear is often not designed for this. Fabrics that are comfortable in daily life can retain moisture or start to chafe during sport.

Good sports underwear does exactly the opposite. It supports your body without constricting, wicks away moisture and prevents irritation in high-friction areas.

You often notice the difference within the first minutes of your workout.

What are the best sports underwear?

The question “what are the best sports underwear?” doesn’t have just one answer, as it depends on your sport, body and personal preference. However, there are a few characteristics that are always important.

The best sports underwear:

• breathes well
• wicks moisture quickly
• doesn’t chafe
• stays in place
• keeps its shape during movement

That last point is often underestimated. Underwear that rides up or twists during exercise quickly becomes distracting and reduces comfort significantly.

That’s why more and more athletes consciously choose high-quality materials and a well-designed fit.

Which material is best for sports underwear?

Material plays perhaps the biggest role in sports underwear. During exercise, your body produces heat and moisture, making breathability essential. Cotton is still widely used, but it is actually less suitable for intense movement. It absorbs moisture but does not effectively wick it away, which means it stays damp and can feel heavy and uncomfortable.

Modern materials such as TENCEL™ Modal perform much better during sport. These fibres regulate moisture more effectively and feel softer on the skin. This helps you stay fresher and drier, even during intense training sessions.

In addition, a smooth fabric helps reduce friction, significantly lowering the risk of irritation or chafing.

Why do you get chafing from underwear during sport?

One of the most common frustrations during exercise is chafing underwear. This is especially common during running, fitness or cycling.

The cause is usually a combination of moisture, movement and poor fit. When fabric becomes wet and doesn’t sit properly, extra friction occurs, leading to irritation. Good sports underwear prevents this by fitting closely without being tight. A smooth, breathable fabric also helps keep the skin dry and move freely.

The length of the legs also plays a role. Slightly longer boxer briefs often provide extra protection against chafing.

Is tight or loose sports underwear better?

Many people wonder whether tight or loose underwear is better for sports. In most cases, a close-fitting design is the best choice. Loose underwear can shift and bunch up during movement, increasing the risk of irritation and distraction.

Fitted sports underwear moves with your body. It stays in place better and avoids excess fabric that can cause friction.

However, it shouldn’t be too tight. A good balance between support and freedom of movement is essential.

Why breathable sports underwear makes such a difference

During exercise, your body needs to release heat. Good breathable underwear helps by allowing air circulation and quickly wicking away moisture. This keeps you not only drier, but also fresher throughout your workout. Especially during intense sports or hot weather, this makes a big difference.

In addition, breathable sports underwear helps reduce bacteria build-up and unpleasant odours. A dry environment is simply more comfortable and more hygienic.

What underwear is best for running?

Running places high demands on underwear. Constant movement creates a lot of friction, especially around the legs and waist. That’s why many runners choose boxer briefs with slightly longer legs and a close fit. This prevents the fabric from riding up and reduces chafing.

Moisture regulation is also crucial. During long runs, you want underwear that stays light even when you sweat. Materials like TENCEL™ offer a clear advantage here because they manage moisture efficiently while staying soft against the skin.

How important is the waistband in sports underwear?

The waistband may seem like a small detail, but it plays a major role in comfort. A good waistband stays securely in place without digging in. During exercise, you don’t want to constantly adjust your underwear or feel pressure points.

That’s why it needs to have enough stretch and adapt smoothly to your body.

Why more athletes are choosing premium underwear

Where sports underwear used to be purely functional, athletes today are increasingly looking for quality and durability. Premium underwear lasts longer, retains its shape better and provides noticeably more comfort during intense movement. Especially if you train several times a week, the difference becomes clear quickly.

At Undiemeister, we therefore combine high-quality materials such as TENCEL™ Modal with a fit designed for both everyday comfort and active performance. The result is underwear that feels great during sport and beyond.

Frequently asked questions about sports underwear

What is the best sports underwear for men?

The best sports underwear is breathable, moisture-wicking and stays in place during movement. Materials such as TENCEL™ Modal are highly suitable.

Is cotton good for sports underwear?

Cotton feels comfortable but retains moisture, making it less suitable for intense sports.

Which underwear prevents chafing during sport?

Close-fitting boxer briefs with longer legs help prevent chafing and stay in place better during movement.

Why is breathable sports underwear important?

Breathable underwear helps release heat and moisture, keeping you drier and more comfortable during exercise.

Better training starts with better underwear

The best sports underwear is not just about support, but especially about comfort, ventilation and freedom of movement.

When you choose high-quality materials and a well-designed fit, you immediately notice the difference during training: less irritation, fewer distractions and more focus on performance.

Because ultimately, even during sport, one rule remains the same: comfort starts at the base.