Features: Integrally-molded construction with ABS hard shell and EPS foam provides ultimate impact resistance and protection. Removable transparent goggles provide wide field of view and allow you to wear your glasses under the goggles. Air vents on the front and back enhance air flow and breathability, keeping you cool and comfortable. Adjustable dial system provides a customized fit for 56 - 61cm (22 - 24) head circumference. Soft, breathable lining pad is removable for easy washing.