No enjoys Cycle in warm weather with a stifling . That's this is designed with over 31 vents, ensuring abundant airflow and cooling to make your ride more comfortable. <> <> Features: <>This mountain is designed to fit head circumferences of 59-61cm, ensuring a snug and secure fit.  <>Equipped with an EPP chin support, this mountain offers enhanced conservation.  <>Featuring a removable and washable comfort liner, this MTB ensures easy maintenance and hygiene.  <>Designed with over 31 vents, this provides ample airflow and cooling.  <>Lightweight in design, this ensures long-term use without causing any strain or discomfort to your head and neck. <> <> Specifications: <>Material: PC, EPS <>Color: Orange/ Blue/ Green/ Black/ Black & White/ Black & Red/Black & Grey/ Grey (optional) <>M for head circumference 55-58CM  <>L for head circumference 59-61CM <>L Size: 36.8*24.6*28cm/ 14.5*9.7*11in <>M Size：36*23.5*27cm/14.2* 9.9*10.6in <>Weight: 710g/  25oz <> <> Package list: <>1 *