What is the drag effect on swimwear?

[JamesSwim]

Originally Posted by Bede735

Though maybe the difference is more pronounced in long distance swimming? I like to swim at least 50 lengths in a session, but to attempt that wearing board shorts sounds exhausting.

Yes, I think it's best to use other things, like pull buoys or kickboards to adjust you swimming. I think 50 lengths in board shorts may get really tiring.