Align your passion with your values, and enjoy this eco fashion piece. The Modus Vivendi. Seamless Classic Brief features an elegant brief with a knitted waistband and the Modus Vivendi logo on it. Made from supreme green cotton fabric that is sustainable having an OEKO-TEX certification, this brief is naturally cozy, has a lux feeling as it is long-lasting. If you love the planet you’re sure to love this too.