A jacket is a light coat that is
usually waist- or thigh-length. A straitjacket is a
garment shaped like a jacket with overlong sleeves. The
ends of these can be tied to the back of the wearer, so
their arms are kept close to their chest with possibility
of only little movement. Although straitjacket is the most
common form, strait-jacket is also frequently used, and,
in England, strait-waistcoat (archaic). The spellings
straightjacket and straight-jacket are now valid
alternatives, although the original term came from strait
meaning narrow or confined; thus straitjacket is
preferable. Straitjackets are used to restrain people who
may otherwise cause harm to themselves and others. Its
effectiveness as a restraint makes it of especial interest
in escapology. The straitjacket is also a staple prop in
stage magic and is sometimes used in bondage games.