Review (5/5): Fits well and keeps water mostly out
These caps are large enough to fit on my head easily. It covers all my hair without needing to really adjust or stretch.
The bow portion allows you to tighten the cap to really seal the water out. Without tighten, the edges of my hair were still getting a bit wet. With tighten the bow straps, I think I was able to keep out 90% of the water.
The little bit of water that does get in, dries much faster, and I don't have to go to bed with wet head :)