This is a unique bonded fabric cap with a non slip edge specifically designed to hold and shape longer hair it shapes hair for significantly improved hydrodynamics compared with short or no hair comfortable and easy to use wear under the fastskin3 cap for best results you can also use the fit point marker seams to accurately align with the fastskin3 cap by touch additional info this cap has been fully approved by fina composition 75 polyamide 25 elastane