A prison uniform is the unified outward appearance of detainees in a situation of imprisonment. It is typically adapted under constraint.
Usually a prison uniform consists of a visually distinct garment, which must be worn by an incarcerated person instead of his or her individual civilian clothes. In most cases it is purposefully designed to establish a visual contrast to the outward appearance of prison officers and set up a clear distinction from civil clothing.
A prison uniform serves the purpose to make prisoners instantly identifiable, to limit risks through concealed objects and to prevent injuries through undesignated clothing objects. It can also spoil attempts of escape as prison uniforms typically use a design and color scheme that is easily noticed and identified even at a greater distance.
A conception for a prison uniform can further purposefully exclude items of otherwise standard clothing as a discrete identifier. This often includes a restriction in terms of footwear, hereby forcing prisoners to remain barefoot as a part of their dress code.
The state of wearing a prison uniform in many cases provokes a distressful psychological response from the detained person, as unlike civilian clothes it is worn involuntarily, typically reluctant and is often perceived as stigmatizing. The imperative regulation of a person's outward appearance is typically perceived as a steep invasion into the autonomy of decision. As a consequence the loss of individuality particularly caused by having to wear a prison uniform can have a detrimental effect to a person's self-perception and self-esteem. Therefore a prison uniform is often perceived as an implicit element of punishment and a stigma, while the level of psychological distress and humiliation caused by the garment is in large part determined by its characteristic and overall design.
Using some manifestation of a prison uniform for incarcerated individuals has become the standard within the penal system of most countries. Some facilities may however not issue designated uniform garments to the inmates as such. Primarily depending on the economical conditions a unified dress code is sometimes specified in facilities of different countries, which typically includes confiscating and withholding certain items of otherwise standard clothing. This way the required distinctive appearance to tell inmates apart from regular civilians is obtained in a similar way to uniform garments. This commonly occurs for financial reasons, as this option is naturally free of cost.