Nutcase's Little Nutty kids' helmets have a spin dial in the back for maximum comfort, the Nutcase magnetic buckle for one-handed operation and, best of all, no pinching! The detachable visor provides shade from the sun and rain while the soft chin pad makes the helmet extra comfortable. Front, top, and back venting helps keep little heads cool. The Little Nutty Helmet also features a durable ABS shell, protective EPS inner foam lining, 360 degree reflectivity, and comes with extra sets of foam pads for the perfect fit. The Little Nutty with MIPS also features Multi-directional Impact Protection System (MIPS), a leading slip-plane technology inside the helmet designed to reduce rotational forces that can result from certain impacts. Please note: Little Nutty comes in a single size, X-Small, for head sizes 18.9in - 20.5in (48cm - 52cm) and generally fits children ages 3 to about 6 or 7 years old. Please measure your child's head before ordering, if at all possible. If Little Nutty is too small on your child, please consider Nutcase's Street Helmets. The adult size Small is the next size up. If Little Nutty is too big on your child, please consider our Baby Nutty Helmets.