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) Ivy League dress manner, the former with two of its four locations found at Harvard and Yale universities (the Princeton branch closed in 1943). The Ivy League style was epitomized by the sack suit, which is defined as being a 3-to-2 (3 buttons with the top button "rolled" back to reveal only two usable buttons) jacket without darts and a single "hooked" vent. The pants were typically cuffed and without pleats. It was also characterized by the use of natural fabrics, shirts with button-down collars, and penny loafers. In suits, the Ivy League style was promoted by clothier Brooks Brothers