Through an exclusive partnership with KTH Royal Institute of Technology (KTH) and Mips, we shared our helmets CAD designs and studied the malleable skulls of young children with Finite Element Analysis (FEA). Because toddler-aged childrens heads are softer and still growing, using low density foam - and more of it - was the outcome of this partnership.Key Features: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