Features: A brand new one-size easy fit non-waterproof swimming hat suitable for both men and women. It is made from a nylon Spandex material and will not pull your hair when putting it on or taking it off. Some facilities require the wearing of swim caps to protect filters from getting clogged with hair or to ensure long hair doesn't get caught up in equipment. It is useful for keeping the sun off the hair and also when worn with ear plugs to keep water out of the ears. Great for competition swimmers to reduce drag in the water caused by loose hair. During long swimming sessions a swim cap helps to keep the wearer's head warm. · Made from High Quality Nylon Spandex Material · It will not pull your hair when putting on or taking off like Latex ones · Ideal for Mens, womens and kids ·Colours: black / royal blue · Material: Spandex and Nylon · Hat Size:21 cm x 14 cm / 8.27 inch x 5.51 inch ( unstretched ) Package Includes: 12 x Swimming Hat (6*black ,6* royal blue)（not waterproof ）