If you have ever seen competitive swimming, you will see swimmers with there head covered. That item covering their head is a swim cap.
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Extra Large Swim Cap, Swimming Cap For Long Hair
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Extra Large Swim Cap, Swimming Cap For Long Hair
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Why You Should Wear a Swim Cap
Spacious designed for long hair - Created for swimmers with long hair, the swimming cap is built to accommodate and protect long hair, thick hair,
Aegend Swim Caps for Long Hair, Durable Silicone Swimming Caps for Women Men Adults Youths Kids, Easy to Put On and Off, 4 Colors
Why Athletes Wear Swimming Caps - And Why You Should Too! – Ninja Shark Australia
adidas x SOUL CAP, Swimming Cap For Long Hair