The Specialized Mio Toddler Helmet is perfect for toddlers on the move, the Mio helmet features bold graphics, a simple and secure buckle, and the Headset SC fit system for an easy, secure fit. Specialized Mio Toddler Helmet Features Headset SC fit system with toddler-oriented sizing that's designed for an easy and accurate fit. In-moulded shell improves strength and reduces weight. Standard buckle design Tri-Fix web splitter for improved comfort and ease of strap adjustments. Reflective webbing for increased visibility in low-light conditions. Integrated visor/sun brim provides shelter from sunlight. Front mesh-covered vents to keep out bugs. Shape designed to accommodate child trailer use. Toddler size, approximately up to age three.