I swim in the ocean in calm to wavey conditions.  I use this to block the sun from the top of my head - it works well.  It fits nicely and is quite comfortable.  Don't try to pull it down over your ears as they will fill up with water and feel uncomfortable.

i love this cap!  it keeps my hair in place and allows me to swim laps without any discomfort.  it doesn't pull my hair like latex.  i would highly recommend this cap!

So far, it's perfect. Too soon to know how long it will last, but my head is very happy.

Works better than plastic caps inasmuch as it doesn't tear my hair--and I swim a lot.

Speedo swim caps are terrific.  They're big enough to fit around your whole head and fit all the hair in too.  (Other brands are smaller or bigger and slip off.)

Kids love the comfort vs. the silicon for practice.