Swimming caps, do you wear one?

I am swimming a lot at the moment and I have long hair. I hate wearing swimming caps, but my hairdresser said she noticed a slight green tinge to the blonde in my hair. I don’t really want green hair so I’ve decided I have to wear my swimming cap. I tried wearing my Speedo swimming cap. My hair still ended up wet. I’ve tried putting my hair in a ponytail and not putting it in a ponytail, but either way, the water seeps in and my hair ends up wet.

Do any of you wear a swimming cap that works really well and keeps your hair dry?

I know I could just go in the shower every time I swim, but it’s hot as hell here and it’s nice to just get out of the pool and stay wet for a while. Plus I’m getting in and out during the day and I don’t want to have to keep washing or even rinsing my hair.