Silicone Swim Caps. 

Silicone is one of the most ubiquitous materials used for swimming caps. Additionally, it is extremely durable. Silicone caps will last for years, when cared for properly. As a  swimmer, silicone is definitely my favorite cap material. Not only is it long-lasting, but it also lends itself well to slipping on and off without pulling hair (a plus for both men and women!).