We drove home after dark. Little Mrok slept quietly on Monika’s lap. We glanced at each other, wondering what came next.

In Practice: Step out into the rain. If your jacket is dry – the membrane works. With heavy rain and fresh DWR, it still works, but less efficiently. Once the fabric is soaked, breathability drops to almost zero. You’ll stay dry from the outside, but wet from the inside.

We decided to listen to the trainers. But it didn’t take long to notice that real objectivity is rare. Trainers tend to recommend what they personally use - and those preferences vary wildly. Some also promote products from sponsors or their own shops.