When you’re cycling, the most important thing is to wear weather-appropriate clothes. In any case, make sure that you’re wearing comfortable clothes to move in. If it’s a little chilly outside, then it could be a good idea to wear layers. The first five minutes on the bike might be a bit cold, but after the first few kilometres your body will start warming up. At this point, it’s nice to be able to take off a layer of clothes. Other than that, it’s mostly just important to wear comfortable clothes. For example, it could get pretty uncomfortable to wear tight pants when cycling long distances.