I don&#x27;t have a dryer, but I&#x27;ve still had cotton shirts (not t-shirts) shrink in the washing machine. This usually happens the first time (or first few times) they are washed at the temperature recommended on the label: 40°C (104°F). However, at 30°C (86°F) I&#x27;ve never encountered any shrinkage. So this purely anecdotal experience makes me believe that the temperature of water can affect some cotton garments.