I'm not familiar with the term seersucker...
(Sorry for the J.A. Banks image. Only one I could find quickly.) Bruce Boyer writes
about the seersucker suit:
American seersucker is a cotton version of the silk seersucker worn in the nineteenth century by the British in India. The word itself seems to be a Hindi corruption of a Persian phrase, shir shakkar, which translates as "milk and sugar." This etymology refers to the alternating smooth and rough textures of the stripes, the distinctive feature of the cloth, which is achieved by what is called slack-tension weaving: alternating fibers are held under normal tension, while intervening ones are kept slack to create a pattern of puckered and flat stripes. Seersucker's most distinguishing characteristic is its greatest stylistic virtue as well: it flaunts its rumpled state with aplomb. It became popular as the perfect cloth for hot, humid climes. In the South, men began to wear seersucker suits in the summer around the turn of the century as a more comfortable alternative to flannel and linen, but they were considered a rather cheap approach to dressing and had little fashion allure until university men began wearing them after the First World War. They were seen at tony country clubs in the '30s and '40s but didn't really catch on with businessmen in the North until the end of the Second World War...
I very badly want a J Press seersucker suit. In answer to your question, how about linen or poplin? The more often you wear Spectators the better.