Synthetic clothes create a stink

Why is it that some of your gym clothes stink more than others? A study has found that gym wear made of polyester materials designed to keep you dry are much more likely to smell than clothes made with cotton. Unlike cotton fibres, synthetic fibres don’t absorb moisture, instead letting it collect in the gaps between the fibres. This space becomes a breeding ground for bacteria if the clothes are sealed in a plastic bag until you get home.