Lightweight, stylish, and super comfy - it's no wonder why kids can't get enough of the Nina. This low-profile kid lid delivers the same style, comfort, and protection as Bern's grown-up helmets, but now with colorways as bold and vibrant as your little shredder. Engineered with lightweight ZipMold+ technology and the dialed-in CompassFit system, this mini-lid helps young riders stay out there without getting in harm's way. FEATURES: ZipMold+ construction offers Bern's liquid foam formula that makes for a lightweight and durable shell design CompassFit lets you customize your child's fit with the twist of a dial Patented flip visor provides low-profile style and functional protection from the elements 7 vents for comfortable air flow Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older. EN1078 Sizing: Size (Age): S/M (5+) Circumference (cm): 51.5-54.5