Abus smiley 20 childs butterfly helmet 2017 the lightweight smiley sets the bench mark in safety for children infusion technology used for robust and superior connection of outer shell and the shock absorbing eps extended foam visor for maximum face protection deep temple and neck protection flat rear side allows perfect fit in child seatstrailers size adjustment made quick and simple via full headring with compact adjustment wheel designed with 8 large air vents for maximum breathability