Finely perforated back and side panels help to release heat, whilst the holes are small enough to keep out the sun's rays. If you're looking for cooling and ventilation for high-performance, this cap will help you to maintain a cool head in hot conditions or during intense exercise. The stretchy headband and adjustable velcro strap make it easy to shape and fit the cap comfortably to your head, while the pre-curved visor helps to maintain its shape over time.