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GMAX® is excited to introduce the ALL NEW AT-21Y designed competitively from the ground up. The AT-21Y is constructed from a lightweight Polycarbonate shell offering superior protection and exceeds DOT and ECE safety certifications. Internally, the helmet is equipped with an inner sun shield, SpaSoft™ interior and a NEW quick release buckle system. The removable, adjustable interior is designed so the helmet can grow as your child does.ECE / DOT Approved Quick release buckle system Lightweight Polycarbonate shell. Youth size 3 lbs One shell size with removable, washable interior that can be adjusted to three different sizes so the helmet can grow as your child grows Drop down sun shade with anti-fog coating Recessed speaker pockets in the EPS for communication systems