A henley shirt is a collarless men's pullover shirt, characterized by a 10 centimetres (3.9 in) long placket beneath the round neckline, usually having 2-5 buttons. It essentially resembles a collarless polo shirt. The sleeves may be either short or long, and it can be made in almost any fabric, although cotton, cotton-polyester blends, and thermals are by far the most popular. Henley shirts are generally regarded as menswear, but recently women's versions have appeared as well.

They were so named because this particular style of shirt was the traditional uniform of rowers in the English town of Henley-on-Thames.^{[citation needed]}

Originally quite popular in the early 1970s, henley shirts have recently made a fashion comeback, especially in Western countries such as the United Kingdom, United States, Canada and Australia, but also in some East Asian Countries such as Japan and Korea.

In his biography of Ralph Lauren, the journalist Michael Gross quotes a New York merchant who recalled showing a vintage shirt to a Ralph Lauren buyer: "I showed this fellow underwear---a three-button long-sleeve shirt by Johnstown Knitting Mills. He said, 'This is a new shirt.' That's where he got the idea for the Henley shirt."

Denaun Porter (born December 7, 1978), also known as Denaun and Mr. Porter, is an American rapper and record producer.

Porter was an original member of the Detroit hip hop group D12.

Throughout his career he has both produced and performed vocally, producing songs for many notable artists such as Eminem, Busta Rhymes, Snoop Dogg and 50 Cent (produced the song "P.I.M.P.").

Denaun is Eminem's current hype man after the death of D12 band member Proof.

Porter was a co-executive producer, with Eminem, for Bad Meets Evil's debut album Hell: The Sequel. He also has a cameo appearance in their music video "Fast Lane" as well as "Forever" by Drake, Kanye West, Lil Wayne and Eminem, and "No Love" by Eminem and Lil Wayne.

Denaun is planning to release his debut studio album The Memo in 2012.

On March 24, 2012, Porter announced through Twitter that he had left D12. He said that he wanted to focus on being a solo artist, but clarified that he holds no animosity toward other members of the group.