Ad from The Cornell Daily Sun, 10/18/65 (click to enlarge)

Ad from The Tech (MIT), 11/7/62 (click to enlarge)
"They were the rage at Southern universites in the late 50s-early 60s.They were sort of fuzzy, and the tag carried a strong warning against ever bleaching them. Therefore, everyone did bleach them and, as a result, they turned slightly orangish-yellowish. They also wore holes at the heels awfully quickly. With their unique color, they were just the thing to wear with your BD short sleeve madras shirt, khaki trousers, tan Baracuta G-9 jacket and Weejuns."
Source:
Andy's Trad Forum - Ken C. Pollock, 6/16/07