MODUS VIVENDI seductive design part of the Siren collection. Sirens are the ancient Greek mythical human beings with seductive abilities. The Modus Vivendi Seductive T-String - Black is a bold and rich design string, with a low rise and regular fit. It is made from elastic mesh fabric and features a fully revealing design without lining. The double lurex elastic waistband provides comfort, while the signature cut metal tag at the back is nickel-free.