“Although straitjacket is the most common spelling, strait-jacket is also frequently used, and in Scotland strait-waistcoat, which is generally deemed archaic. Straitjackets are also known as camisoles.”
“Due to the strength of the material, canvas or duck cloth is often used for making institutional straitjackets. However, leather or PVC is most often used for recreational or fashion wear.”
That’s straitjacket, not straightjacket.
“Although straitjacket is the most common spelling, strait-jacket is also frequently used, and in Scotland strait-waistcoat, which is generally deemed archaic. Straitjackets are also known as camisoles.”“Due to the strength of the material, canvas or duck cloth is often used for making institutional straitjackets. However, leather or PVC is most often used for recreational or fashion wear.”