For outdoor enthusiasts, having the right clothing is essential. Whether it be waterproof jackets for rainy hikes, thermal underwear to keep you cosy in the cold, or socks that decrease the chance of getting painful blisters. But ironically, those who treasure the environment often wear garments that are damaging it. To keep clothing such as jackets waterproof and breathable, the outer layer of a garment is usually coated in a membrane - a film that is often made with per and polyfluoroalkyl substances (PFASs).
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