Features: Stay cooling and protected during rides with this breathable cycling skull cap with sun blocking fabric, moisture wicking technology, and helmet friendly design for cyclists and runners. The adjustable brim offers sun protections when needed and enhancing visibility, simple design and mesh hole ensure comfortable during outdoor adventures. Perfect for men searching headgear that seamlessly integrates with bike helmets during road cycling, mountain biking, or long distance running. Engineered with stretchy Spandex, this skull hat stays comfortable during high intensity workouts, trail exploration, or daily wear under protective headgear. Its compact double layer sweatband prevents eye irritation during strenuous activity, while the elasticized back ensures great fitted for various head size. Specifications: Component: Spandex Product Dimension: Approx. head circumference 55-60cm/21.65-23.62inch Color Option: 6 optional color as pictures shown Package Includes: 1PC Sport Hat note: Please allow 1-2cm error due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.