Henley Shirt

A henley shirt is a collarless men's casualwear pullover shirt, characterized by a 4-6" long slit beneath the round neckline, usually having 2-5 buttons. It essentially resembles a collarless polo shirt. The sleeves may be either short or long sleeve, and it can be made in almost any fabric, although cotton and cotton-polyester blends are by far the most popular. Henley shirts are generally regarded as menswear, although women sometimes wear them, too.

They were so named because this particular style of shirt was the traditional uniform of rowers in the English city of Henley-on-Thames.

Originally quite popular in the early 1990s, henley shirts have recently made a fashion comeback, especially in Western countries such as the United States, Australia and Canada. As well as in some East Asian Countries such as Japan and Korea.

Relevant definition links for your review:

Sleeves

Croptop

T-shirt

Tank Top

Sweater

Clothing Definitions

Blouse

Chemisette

Cufflink / Cufflinks

The Buttoned Placket Is the Definition

Everything about a henley follows from its short placket. A pullover shirt needs an opening to pass over the head, and where a polo shirt solves the problem with a collar and placket together, the henley keeps only the placket: a slit of four to six inches below a round, collarless neckline, closed by two to five buttons. Worn buttoned, it reads as a plain crew-neck shirt; worn open, it has the relaxed look that made it a casualwear staple. The placket is usually reinforced with a facing or a ribbed band so the slit keeps its shape, and the neckline itself is finished with a narrow ribbed or self-fabric band. Because there is no collar to structure it, the henley's character comes from its fabric — fine cotton jersey for a smooth shirt, waffle or thermal knits for a heavier, textured one.

The rowing origin explains the design's practicality: a collarless pullover with a vent that can be opened for cooling is sensible athletic dress, and the henley moved from the Henley-on-Thames rowing uniform into general menswear as a layer and then as a shirt in its own right. It was originally quite popular in the early 1990s, and henley shirts later made a fashion comeback, especially in Western countries such as the United States, Australia and Canada, and in some East Asian countries such as Japan and Korea. In modern wardrobes it sits between the T-shirt and the polo: more finished than a plain tee because of its buttons, less formal than a polo because it has no collar, and commonly worn as a base layer under shirts and jackets as well as on its own.