Dancers also wear white underskirts and a white apron. Princess-line polonaises' were worn over long underskirts. Tunics became longer and underskirts fuller and shorter. Tulle may also be used in underskirts or petticoats to create a stiff belled shape. She walked around the city with $56,000 in government bonds sewn into her petticoats (underskirts). Many schools also require underskirts to be worn with the cheongsam. Above this came the lowest layer of underskirts, called "soksokgot" ().