Set your littlest riders on the path to two-wheeled freedom with the all-new Mio 2 helmet. Because toddler-aged children’s heads are softer and still growing, using low density foam - and more of it - was the outcome of this partnership. Mips-equipped. Headset SX fit system with toddler-oriented sizing that's designed for an easy and accurate fit. In-molded shell improves strength and reduces weight. Tri-Fix web splitter for improved comfort and ease of strap adjustments. Reflective webbing and rear decal for increased visibility in low-light conditions. 46-51 cm OSFM Toddler size, approximately up to age three.