Details If you've always been drawn to the challenge of a new route, a new trail, the thrill of the unexpected, the Smith Network bicycle helmet is your versatile, shred-ready bike helmet, designed for whatever you get into on two wheels. Safety techs like Koroyd® and MIPS® offer protection and enhanced energy absorption should you need it. When the sun is blazing and you're heating up, the ventilation system keeps air flowing and your eyewear fog-free. Later, when the light dips beneath the hills, store your shades in pass-through channels on the front. Construction Zonal Koroyd® coverage for lightweight, energy-absorbing and ventilated impact protection In the event of an impact, Koroyd's welded tubes collapse instantly and evenly, absorbing maximum force in a controlled manner and thus reducing the amount of energy transferred to the head. The air circulates evenly through the open cells, while the warm air in your head can easily escape, ensuring more efficient cooling under the most intense conditions. Characterized by tubes with the thinnest walls in the world, the Koroyd structure is composed of 95% air. This reduces weight and improves comfort without compromising safety. MIPS® Brain Protection System Found inside the helmet, generally between the comfort padding and the EPS (a high-quality foam used to reduce energy), MIPS® (Multi-directional Impact Protection System) BPS reduces rotational forces caused by angled impacts to the head. For certain impacts, the MIPS® BPS can reduce harmful forces transmitted to the brain. CPSC and CE EN 1078 certified Fit Lightweight, low-bulk single layer webbing Ventilation 15 fixed vents for consistent airflow AirEvac™ ventilation system integrates with Smith eyewear for fog-free lenses Details Optional fabric visor Designed for ultimate integration with Smith performance eyewear and goggles for maximum comfort, venting and storage convenience Ionic+® antimicrobial lining offers sweat-activated odor control Helmet Size S51-55cm M55-59cm L59-62cm Weight (Size M, MIPS®): 11 oz / 309 g Smith Network MIPS Bicycle Helmet