Speedo Stretch Fit Swim Cap
The first cap designed  to be easier to put on and take off without compromising fit.  The inner lining is  made of nylon so the cap slips on effortlessly and the outer layer is silicone to give it the durability, stretch and finish you want. Outer Shell 100% Polyurethane / Inner Lining 82% Polyester, 18% Spandex.