Richelieu is made using three different rib sizes: Shirts: These are constructed of two different ribs (see the black inset 207-800 photo to the left). The centers utilize a wide rib of approximately one quarter inch in size. The side ribs measure just under an eighth of an inch. When worn, the ribs stretch out to become larger. Briefs and Boxers: These three utilize the medium rib except where the diagram (see the 207-850 diagram) shows solid white. In these areas the rib is minute ... under a sixteenth inch. See the inset 207-880 white Brief photo below. Again, when worn, the ribs do stretch larger.

Though all colors are specified as hot washable, cold (or warm if necessary in Summer) washing will greatly extend any fine garment's longevity. Though drying on 'Fluff' or 'No Heat' is possible without damage; air drying (line dry) is always preferred.