have the helmet - with various other - tested. The surface is easily scratched (in black) Visually and from feeling the comparable Kerbl Jump very similar or almost identical. the setting by the wheel pulls unfortunately mainly front and rear narrow, so that the helmet pushes me on the forehead. Also you sweat (even in winter) but clearly at the top, which I thought was quite unpleasant. For my head not really comfortable to wear. Surely a cheaper and lighter helmet, but if you want to wear it on a regular basis (which indeed would be the end) then it's too uncomfortable
