For the record, men's (and women's) motorbike trousers come in just about every imaginable design. Of course: two trouser legs and a crotch will always be common, but apart from that there is a multitude of possibilities and options.
The left-hand column on this page helps the motorcycling gentlemen find their way. From leather and textile, through almost all weather conditions, to motorbike jeans. Along almost every relevant manufacturer, through every conceivable price range.