Ideal for commuting, urban rides and exploring local trails, the Smith Optics Express MIPS bike helmet pairs a clean, minimalist shell with an integrated rear light and reflective straps for visibility.Features:Low-profile, ventilated design with lightweight in-mold construction and MIPS offers protection for rides on urban roads and local trailsRotational motion can cause brain injuries; with MIPS, a low-friction layer slides 10 to 15 mm in all directions, reducing rotational motion to the brain during impactRemovable fabric visor is great for keeping the sun out of your eyes13 vents are optimized to provide maximum airflow, keeping you coolAdjustable fit system with easy-to-use dial offers a secure, personal fitIntegrated rear light and reflective straps help you be seen in low-light conditions; light has solid and flashing modes; coin battery includedCertifications: CPSC, CE EN 1078Technical Specifications:Best Use: Recreational CyclingHelmet Style: Recreational CyclingHelmet Construction: In-moldShell Material: PolycarbonateHead Circumference: S: 20.1-21.7 inches, M: 21.7-23.2 inchesVents: 13Visor/Brim: YesWeight: 11.6 ouncesGender: UnisexComplies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older