Ivy League Group Agreement to all intercollegiate sports, effective with the 1955–56 basketball season. This is generally reckoned as the formal formation of the Ivy League. As part of the transition, Brown, the only Ivy that hadn't joined the EIBL, did so for the 1954–55 season. A year later, the Ivy League absorbed the EIBL. The Ivy League claims the EIBL's history as its own. Through the EIBL, it is the oldest basketball conference in Division I. As late as the 1960s many of the Ivy League universities' undergraduate programs remained open only to men, with Cornell the only one to have
Ivy League (clothes) and included natural shoulder single-breasted suit jackets. In 1957 and 1958, about 70% of all suits sold were in the "Ivy League" style. Typical hairstyles included the crew cut, Harvard clip, and regular haircut, and common clothing items included cardigan sweaters, sweater vests, Nantucket reds, khaki chino pants, knitted ties, white Oxford shirts, Tootal or Brooks Brothers ties, Ascot neckties, tartan, grey tweed cloth or flannel sportcoats, and seersucker blazers in the South. From the late 1950s until the mid 1960s, Ivy League clothing was considered desirable mainstream apparel for middle class adults in the US. In Britain during the