They use a three-panel shape, a textured exterior, and a comfortable stay-in-place edge to reduce slipping and provide a secure fit.
These caps provide generous coverage to tuck hair away, but they are not guaranteed to keep hair completely dry. Descriptions note they help reduce water penetration compared with many standard caps, though some moisture may still get through.
They are described as having a looser fit than traditional latex caps and use a three-panel design. Flat measurements commonly listed are height 7 1/4" with a 10 1/2" opening to accommodate various head sizes.
They are intended for swimming and are also described as comfortable for water aerobics.
They use an easy pull-on style and a looser fit, making them simple to put on and remove without much hassle.