- All black 7-Pack Trunks - Midnight Magic. Made only from the finest fabrics. Mosmann Australia's underwear surpasses cotton for softness with a natural sheen and silky hand feel comparable only to natural silk. With excellent moisture wicking and anti-bacterial properties to keep you fresh all day long. We use Dupont Lycra over standard elastane to ensure that your underwear retains its shape wash after wash. 95% Viscose (From Bamboo), 5% Lycra.