I've added zipper pockets to several pairs of pants, just for shopping. Sort of like a bound buttonhole with a zipper, setting the pocket just under the band on the pants front. They will safely hold my driver's license, a credit card, and a check or two.( Maybe even a dollar or two.) If you try this - use a nylon zipper. The metal one will really bite when you dig in to pay for your S.E.X. I enjoy wearing these when shopping so I don't have to even think about protecting a purse. Shopping purse-less does make you a target for all those who assume that you are a sales clerk. Sometimes I help them, sometimes I don't. Depends on my sense of humor at the time. Polly