Hammer Head Swim Cap

I haven't really used it yet. The pool I go to is closed for a few weeks but I have tried it on and it is very comfortable.

The protection is not enough on the sides

Fits like a glove, and doesn’t work its way up while swimming. I actually feel some reduction in drag while wearing this cap! Thanks to “The Fundamentals of Fast Swimming” (Gary Hall, et al) for suggesting donning this cap for drag reduction!!