Very nice, high quality Elbeco Uniform Pants E1494R 75%Polyester 25%Wool Regular Rise Black Stripe. Note that this model is formal and does not have front pockets. These are made by the same company but are a slightly different model, so not official regulation postal pants, but many people have bought them for that purpose. Note: these are professional uniform pants and the waist measurement on these pants is very accurate. For instance, if they say 36 wide, the waist band will measure exactly 36” around. I have checked on multiple sizes. They are manufactured precisely so be careful, they may seem tighter than "normal" pants that are manufactured which are usually more relaxed fit and are inaccurate in their actual waist measurements. If in doubt, I suggest measuring your current pants with a tape measure, not by what they say on the label. Or, measure your waist directly.