Functional Sportswear: What the Term Actually Means

"Functional" appears on a lot of sportswear labels. Usually because it sounds good. Sometimes there's real thinking behind it.

This article explains what functional sportswear means, which properties genuinely make a difference — and why material decisions at M23 start from the intended use, not from trends.

What "Functional" Actually Means

Functional clothing starts with a simple question: what does the person wearing it actually need? Not: how does it look on a mood board.

That sounds obvious. It isn't — many collections start with aesthetics and add function afterwards. Functional clothing reverses that: function determines cut, material and construction. Aesthetics follow.

An example: joggers for yoga and outdoor fitness need freedom of movement in every direction and pockets that don't get wet and heavy after training. That leads to organic cotton with elastane and a pocket lining in recycled polyamide.

The Properties That Actually Matter

Moisture: Cotton absorbs sweat and stays wet. Polyamide dries fast. For intense sessions, that's the decisive difference.

Freedom of movement: Stretch alone isn't enough. The cut has to allow the movement. Joggers with too narrow a crotch restrict deep squats and sprints, regardless of how much stretch the fabric has. For Hyrox, you're better off in shorts like Zane than in long trousers.

Fit after washing: A shirt that fits differently after a few washes isn't a good shirt, whatever the material. Look for reviews that describe exactly that.

Weight: Clothing that's too heavy costs you energy in training. The right weight depends on the use: lighter for yoga and running, slightly heavier for outdoor fitness.

What This Means at M23

Every M23 piece starts with the question: what sport is it for, and what does it need to do?

Organic cotton with elastane for yoga, everyday wear and moderate training — because breathability and skin feel matter more than quick drying here.

Recycled polyamide for leggings and biker shorts — because stretch and quick drying are what count here.

Recycled polyamide as pocket lining in joggers — because cotton pockets absorb sweat and get heavy. Polyamide lining stays light and dries fast. A decision based on function, not marketing.

How to Spot Functional Sportswear

1. Can the brand explain why it chose this material for this product? If the answer is just "because it's sustainable" — caution. If it's specific ("polyamide for the pockets because it doesn't hold moisture") — good.

2. How does the piece behave after several washes? Reviews that describe exactly that tell you more than product photos.

3. Was the cut made for movement? Deep squats, full arm extension, sprints — functional sportswear should allow all of that without restriction. When in doubt: try it on.

Functional sportswear isn't a luxury or a lifestyle trend. It's made for real people in real situations. At M23, that's the starting point for every piece.