Swim Caps

[Torchwatch]

It's rather unpleasant to pick up long hairs around your face and hands as you swim, and those hairs can block the filters too.
Since some men have hair that is longer than some women it's hard to know where to draw the line so a blanket ban on loose hair is at least fair.
If you swim properly your face and scalp will be in the water and wearing a rubber swim cap will allow you to swim faster.
One of the local swim clubs puts novice swimmers in yellow caps, intermediates in red and experienced swimmers in blue club racing caps or whatever caps the swimmers buy for themselves. By this means they can watch out for inexperienced swimmers at the deep end.

Ladies bath caps tend to be hideous things adorned with plastic flowers etc., far better to wear a simpler rubber swim cap with the option of choosing a printed design of your choice.