Functional Sportswear: What the Term Actually Means
Share
"Functional" appears on a lot of sportswear labels. Usually it's there because it sounds good. Sometimes there's real thinking behind it.
This article explains what functional sportswear actually means, which properties genuinely make a difference, and why material decisions at M23 always start from the intended use — not from trends.
What "Functional" Actually Means
Functional clothing starts with a simple question: what does the person wearing the shirt actually need? Not: how does it look on a mood board.
That sounds obvious. But it isn't — because most collections begin with aesthetics and add function afterwards. Functional clothing reverses that: function determines cut, material, and construction. Aesthetics follow from there.
In practice: a men's jogger developed for yoga and outdoor fitness needs to allow full freedom of movement in every direction, dry quickly after training, and hold its shape after twenty washes. Take those three requirements seriously and you'll land at organic cotton with recycled mesh pocket lining — not because it sounds good, but because it's the technically sensible answer to the problem.
The Properties That Actually Matter
Not every "performance" claim is equal. Here's the difference:
Moisture management Cotton absorbs sweat and stays wet. Nylon moves moisture outward and dries fast. That's physically measurable — not marketing. For intensive training sessions, that's the decisive difference.
Freedom of movement Stretch alone isn't enough. The cut has to allow the movement. A jogger with too narrow a crotch restricts deep squats and sprints regardless of how much stretch the fabric has. At M23 we test cuts for range of motion — that's why the Clint jogger works in Hyrox training.
Shape retention A shirt that loses its shape after five washes isn't a good shirt, regardless of material. Long cotton fibres from Turkey hold their shape significantly better than short-fibre conventional cotton. That's not a marketing promise — it's textile engineering.
Weight Clothing that's too heavy costs you energy during training. Too light and it won't last. The right weight depends on the use: lighter for yoga and running, slightly heavier for outdoor fitness where durability matters more.
Why Functionality and Longevity Are the Same Thing
Here's the connection most people miss: a product that's genuinely functional lasts longer. Because it was developed for real use, not for a campaign.
A shirt that loses its shape after three washes was never truly functional — it just looked like it was. A shirt that still fits the same way after two years has done its job.
That's also why we don't produce seasonal collections in the conventional sense at M23. Our products aren't meant to be replaced in six months. They're meant to work — across training sessions, seasons, and years.
What This Means at M23 Concretely
Every product in the M23 range starts with the question: what activity is this for, and what does it need to perform?
Organic cotton for yoga, everyday wear, moderate activity — because breathability and skin feel matter more than quick-drying here.
Recycled nylon for leggings, biker shorts, and pocket lining — because elasticity, shape retention, and drying speed are critical here.
Recycled nylon as pocket lining in joggers — because cotton pockets absorb sweat and get heavy. Nylon lining stays light and dries fast. That's a functional decision, not sustainability PR.
Production in Berlin and Bulgaria — because short production routes allow more control over quality and construction than anonymous supply chains spread across three continents.
How to Spot Functional Sportswear
Three questions when buying:
1. Can the brand explain why they chose this material for this product? If the answer is "because it's sustainable" without further explanation — caution. If the answer is specific ("recycled nylon for the pockets because it doesn't hold moisture") — good.
2. How does the product behave after ten washes? Customer reviews that specifically mention durability are more informative than product photos.
3. Was the cut developed for movement? Deep squat, full arm extension, sprint — functional sportswear should allow all of that without restriction. When in doubt: try before you commit.
Functional sportswear isn't a luxury or a lifestyle trend. It's the most honest form of clothing there is — developed for real people in real situations. At M23, that's the starting point for every product. Not the finishing touch.