AussieBum Classic Swim Brief 1,. Lovely brief model swimming trunks from Aussiebum. Swim shorts with a low waist and narrow side sections made of 100% nylon. The side sections are 1.5 inches or 4 centimeters. Soft and flexible elastic at the waist with hidden drawstring. The swimming trunks are made of a quick-drying material that guarantees you a summery look on the beach.