True Fit, 1-step adjustment, fits head size 47-51 cm PinchGuard ensures pinch-free buckling 7 vents Extended coverage CPSC 1203 Bike Compliant This Bell Mini infant helmet provides stylish comfort and protection for the smallest passengers. The Bell Mini helps protect the heads of little ones while they're riding in child carriers, bike trailers, or just learning to ride on their own. A True Fit feature offers a proper fit every time, with just a 1-step adjustment. Seven top vents keep kids' heads cool. This helmet has a sleek shape with a "grown-up" visor for protection from the sun and other elements. Safety lights and reflectors improve visibility, and a PinchGuard buckle means no tears when Mom and Dad are snapping the helmet into place