Today many clothes are made from synthetic textiles like nylon or polyester. While these clothes can be washed at lower temperatures and dry faster, they have created an alarming environmental problem. Microfibres are tiny threads from fabric that are shed when washed – up to 730,000 fibres released per wash, if you’re washing acrylic. Their small size means they can be easily eaten by fish or other animals, allowing them to bioaccumulate in the food chain. Many outdoor wear manufacturers used recycled plastic in an attempt to be environmentally sustainable – but this may be causing an even bigger problem that we cannot easily see.