In the 1920s, men’s suits had matching vests. 1920s style men’s vests buttoned up high and had notch lapels, or no lapels by the end of the decade. Most 1920s men’s vests were single breasted, although double breasted vests were available for some. Many working class men weren’t able to afford a 3 piece suit, so an unmatched vest was worn with a similar shade of trouser. In an effort to be more casual, men in the 1920s started wearing vests without suit jackets. Pullover knit vests were also worn alone over a shirt for a more casual sporty look.