Which helmet I used is made in india and the size is 600mm . its dezine is very good. In its front side there is a button by which. Front side going upward. And it is easy to use. I m satisfied with this produrt and the buit quality is hard and good comfort that helmet is oscar by steelbird . Now they delivered it soon. There is no problem. These is no majou problem with the app or website. It is easy to use. Or to order something. This helmet is reliable. And always wear the helmet