If you are looking for Active Shorts or Lounge Shorts, Davis Big and Tall has the big sizes you are looking for by Russell Athletic and Outfitter.  Choose from Russell Dri Power Shorts which wick away body moisture to the soft cotton jersey shorts by Outfitter and Russell.  Russell also offers a big mens nylon mesh short.  All of these Big Mens Shorts come with a fully elastic waist which moves with you for comfort.