Sleeve (O. Eng. slieve, or slyf, a word allied to slip, cf. Dutch sloof) is that part of a garment which covers the arm, or through which the arm passes or slips. The pattern of the sleeve is one of the characteristics of fashion in dress, varying in every country and period. Various survivals of the early forms of sleeve are still found in the different types of academic or other robes. Where the long hanging sleeve is worn it has, as still in China and Japan, been used as a pocket, whence has come the phrase to have up one's sleeve, to have something concealed ready to produce. There are many other proverbial and metaphorical expressions associated with the sleeve, such as to wear one's heart upon one's sleeve, and to laugh in one's sleeve.

Sleeve length varies from barely over the shoulder (cap sleeve) to floor-length, Most contemporary shirt sleeves end somewhere between the mid-upper arm and the wrist.

Often the names applied to sleeves in historical costume are modern.

Quentin Mosimann (born on February 14, 1988, in Geneva) is a Swiss singer, winner of the seventh season of the TV reality show Star Academy France. His first solo album, Duel, is composed of cover versions of 1980s hits. His second album, Exhibition is due for release in May 2010.

Quentin Mosimann was born in Geneva on February 14, 1988, of a Swiss father (a native of Berne in German-speaking Switzerland) and a French mother. However, he only had that Swiss nationality.

He lived for three years in Geneva, then, following the separation of his parents, moved to Bogève, Haute-Savoie, with his mother.

He currently lives in Hyères, Var (since 2005) where he performs, under the pseudonym John Louly, as a DJ, at the NJoy, with John Revox and Christian Sims.

Quentin Mosimann was selected for the Star Academy 7. Throughout the weeks, the young man sang in a jazzy and electro musical universe. With a sole pre-nomination and a victory in the semi-final against Claire-Marie, he won the final on February 15, 2008, with 52.6% of votes, and 47.4% for Mathieu. He won 1,000,000 euros, 200,000 of them immediately available.