Abstract: An underwear garment that is specially constructed to be worn by men having semi-rigid penile implants. The construction includes not only a general type of a brief but also an athletic model, each of which is adapted to include a specifice type of front panel interior pocket or envelope that is constructed of a plurality of panels of material with each panel contributing a particularly desirable retention function. The envelope consists of outer paneling which exerts significant inward retentive pressure against the body and penis while a next layer of soft, thick batting material provides cushioning thereby to avoid abrasive tendencies of the structure. Finally, the inner contacting panels which directly envelope the penis are formed of a very soft fabric having a smooth surface in actual contact with the organ. The alternative sports model necessitates a stronger waistband elastic which, in turn, requires that a soft fabric window portion be placed adjacent the upper portion of the penis member.