just wanted to bump this up with some info that i didn't really think about.

i just learned that these caps shrink like a dick in the pool when you put them in the washer/dryer. my white one was looking extra disgusting so i sent it through. it now sits almost an inch higher on my head than my black one, and they were the same size to begin with. so yeah, if yours already fits tight, make sure to let that **** air dry.