36 Degrees and Still Wearing Plastic

Since late May, Belgium, France, Germany, the Netherlands and the UK have been breaking temperature records some of them held for decades. By the last week of June, an estimated 191 million people were forecast to hit at least 35°C. Summer didn't ease in this year. It showed up and started redecorating.

This is the first entry in the Journal, so it felt right to start with the thing nobody puts on the label: at 38 degrees, your polyester blend is actively working against you. Synthetic fibres don't breathe. They trap heat and hold moisture against skin instead of releasing it, which is an odd party trick for something marketed as "performance fabric."

The industry's answer has mostly been more fabric. Cooling technology, moisture-wicking treatments, anti-odour coatings, each one quietly making up for something the base material can't do on its own. Most of these wash out within a season. What's left is the plastic, permanently, and none of the performance you paid for.

Meanwhile linen has handled hot climates for a few thousand years without a marketing department. So has loosely woven cotton, so has silk. They cool you because that's what they were always doing, long before anyone tried to improve on it with a finish that fades in the wash.

European linen specifically, grown in cooler conditions and processed with a fraction of the water and pesticide input of conventional cotton, is one of the least fashionable and most correct things you can wear. It was never trying to be innovative. It just worked.

If you're wondering why it hasn't taken over: margin. A linen shirt is harder to markup than a polyester one with a technical-sounding name stitched on the collar.

We built the Breathability score so you don't have to take our word, or the label's, for any of this: fibre, weave, origin, run through the same formula every time. Because "will I survive 36 degrees in Europe in June" stopped being a hypothetical a while ago.