Men’s clothing got tighter and tighter. A large portion of the clothes from this era were made of polyester or a blend of cotton and polyester. Later in the decade, velour and terry cloth became a very popular choice of fabric for men’s shirts. The leisure suit, which was introduced around 1972, exploded in popularity after John Travolta’s smash hit “Saturday Night Fever.” http://www.retrowaste.com/1970s/fashion-in-the-1970s/1970s-fashion-for-men-boys/