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For other uses of the term Ivy League see Ivy League (disambiguation)

Ivy League is a style of men's dress, popular in the late 1950s, and said to have originated on college campuses. The clothing stores Brooks Brothers and J. Press represents perhaps the quintessential Ivy League dress manner, the latter with two of its four locations found at Harvard and Yale Universities (the Princeton branch closed in 1942). It is epitomized by the sack suit which is defined as being a 3-to-2 blazer without darts and a single vent. The pants are cuffed 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 and included natural shoulder single-breasted suit jackets. In 1957 and 1958, about 70% of all suits sold were in the "Ivy League" style.^[1][2][3]

Controversially, in a recently revived form, a version of this style is sometimes promoted and marketed online as "American Trad" or simply "Trad.", although there are marked differences between the two styles. 'Trad' being considerably narrower in scope than the original Ivy League style.^[4]

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