modus vivendi sumo brief or t string functional press stud buttons black 15012MODUS VIVENDI design part of the Transformer line, the epitome of a tribute to tradition and origins. Inspired by all those information which passed through the generations by word of mouth. All designs in the transformer line, drawn from memories of the traditional undies and with some modern brush strokes, are presented in their minimal version. Unique design underwear Regular rise cut Regular fit functional press stud buttons Twist the back side