Interestingly, we were just covering military mountaineering and now the Polish brand SPECOPS has introduced a mountain version of their MBS-2 uniform. Dubbed MBS-2M, the initial version is in PenCott Badlands.
This new MBS-2M model is designed for wear in mountain regions with the associated inclement weather. The trousers have a padded high waist to keep snow and wind from coming in and accept suspenders to keep them from falling down when layering. There are also Cordura reinforcements on the hem for use with crampons as well as waterproof zippers for simplified donning and doffing.