Women\'s Running: \'WINNER BEST IN TEST SUMMER KIT\'\' Rated 5/5 - This running cap is so light you\'ll forget your are wearing it, it fitted my head really well with panels for enhanced fit and when i was running it stayed in place perfectly. The mesh fabric keeps you cool on the hottest of runs and there is reflective material on the peak, sides and back whick helps you remain visible if you\'re running at night or low light conditions.\'\' Made from lightweight, form-fitting material Incorporates REFLECT360 reflective material on the peak, sides and rear of the cap Meshed fabric for enhanced breathability Adjustable size range (to fit up to 64cm) Multi-panel design for enhanced fit 100% polyester