Made for great days on the bike and the daily commute alike, the Smith Signal helmet gives you the protection you need no matter where your wheels take you. MIPS® brain protection system helps reduce angled impact forces in the event of a crash, and an adjustable dial on back lets you fine-tune the fit for comfort. Strategic venting keeps the air flowing, your glasses fog-free, and your head cool. And whether you're grabbing a coffee or walking into the office, engineered eyewear channels make for convenient hands-free glasses storage. Key Features: 21 fixed vents for consistent airflow Sweat-wicking liner insulates and fights odors Lightweight, low-bulk single layer webbing Weight (Size M, MIPS®): 11 oz / 3 g Sizes: S - 51-55cm, M - 55-59cm, L - 59-62cm, XL - 61-65cmProtection Lightweight in-mold construction MIPS® Brain Protection System reduces rotational forces caused by angled impacts to the head CPSC and CE EN 178 certified AS/NZS263 certified Fit / Integration Designed fo