Details Mountain Khakis Men's Size Chart Crank the 'awesome' dial to maximum AMPerage. Meet your All Mountain playmate, the summer-weight version of Mountain Khakis' #1-selling classic OMP. In designing the AMP, Mountain Khaki lightened the weight of the organic canvas from 10.4oz (OMP) to 6.2oz (AMP) and added stretch. Red bar-tac stitch accents for pops of attitude. Includes all MK signature features: diamond-shaped action gusset, hidden right pocket and angled.