Clothing styles for men changed little from the 1860s. Only slight details distinguish the 1870s wardrobe from the previous decade.
The jacket continued to become less oversized during the 70s, with a closer fit and narrower sleeves and lapels. The large sack jackets were still worn, but they were only buttoned at the top button, allowing the vest and watch chain to be visible. The man in the image on the left wears a shorter, closer fitting jacket. Also note is vest and watch chain. The man in the image on the right still wears the oversized sack coat.
Vests were worn all the time, even by farmers wearing shirtsleeves and jeans. Shirts of the 1870s came in a wider variety of colors and designs. Collars and cuffs of heavy, starched linen were sold separately so that the shirt did not need as much laundering. The man in the image below sports a striped shirt beneath his single-breasted vest.
A wide necktie was tied in a loose knot low on the throat with squared, overlapping ends, as seen in the images below.