Hoping to tap into the burgeoning consumer market of the postwar era, Siegel launched the company’s first brand, H.I.S (a play on his father’s initials [Henry I. Siegel]), in 1956. The company’s line of branded casual wear targeted teen and college-aged baby boomers with denim jackets, corduroy pants, shorts, sportcoats, and suits. By the mid-1960s,…