Details That's why The new Specialized Mode Bicycle Helmet is designed to fit just right and keep you feeling, and looking cool- because the most advanced piece of technology on your bike is the one attached to your shoulders. Its clean, elegant lines deliver more than modern style, and they integrate hidden vents for increased airflow, so you stay cool even when the temps rise. A seamlessly integrated fit adjustment system and personalized sizing lets you create a fit that's, well, dialed. Take on the city, head on, with the Mode. Construction MIPS-equipped and ANGi ready Fit The integrated fit adjustment system delivers a personalized fit and occipital base adjustment Mode is offered in three shell sizes and two headforms for distinctive fits: Classic SBC headform and Round Fit headform Ventilation Hidden vent integration helps cool you off when the heat is on Details Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older Mode earned the highest 5-Star Virginia Tech® Helmet Rating™ from the internationally renowned Virginia Polytechnic Institute and State University Whether you're riding acoustic or electric, Mode passes the Dutch e-bike Standard NTA8776 so you can ride with confidence Reflective decals and Stix Light compatibility makes for seamless day and nighttime visibility Helmet Size S = 51-56cm / 20-22" M = 55-59cm / 21.75-23.25" L = 58-62cm / 22.75-24.25" Weight N/A Specialized Mode Helmet 2023