A Good Shower Cap?

[Grillz]

Can anybody recommend to me a good shower cap? Whenever I wear them in the shower I end up with condensation underneath OR I sweat and my hair gets wet anyway. This just makes my hair feel dirty! Is there a certain type I should invest in or something else I could try?

Thank you :)

[SoulOfTheSea]

I just use a plastic grocery bag that is twisted and clipped at the top. :) Works like a charm!