Lazer Road Genesis MIPS Cycling Helmet Genesis, the lightest helmet Lazer has ever made, raises the bar for top performance cycling. So light you'll forget it's even on your head! Featuring a superlight version of the Advanced Rollsys System and an adjustable head basket that creates an easy-to-adjust and always perfect fit. The helmet is fully ventilated for maximum cooling with race or comfort padding to shave weight or increase comfort. Specifications: Color: Black Gender: Unisex Outer shell material: Polycarbonate Inner shell material: EPS foam Ventilation: 22 vents Weight: 220 grams Head circumference: 58-61 cm Helmet fitting system: Advanced Rollsys System Size: L