Smart casual is intended for informal occasions but with an upper-class type of environment, similar to having an informal dinner in an upscale restaurant. Males would wear dress trousers, long-sleeve shirts with a tie, patterned or semi-colored socks. A sports coat is optional. Females would wear slacks or skirts, blouse, and possibly a jacket or sweater with mid-heel or flat shoes. Do not wear jeans when asked to dress smart casual