Lazer Blade MIPS Road Cycling Helmet - Unisex MIPS imitates the brain's way of protecting itself by giving the helmet its own low-friction layer between the outer shell and the liner Compact style combined with the Advanced Rollsys System provides an excellent fit and great adjustability Rollsys fit system surrounds your head completely to reduce pressure points, and the thumb wheel on the top of the helmet is easy to adjust on the fly Twenty-two vents to keep you cool and the weight is kept down to make sure you can head down the road in comfort CE, CPSC, and AS safety certifications.