A garment comprising a jacket part comprising a body having a lower edge at crotch level and two arms extending from the body and a trouser part comprising two legs a part of the upper edge of each leg being permanently attached to the lower edge of the body and the remainder of the upper edge being releasably attached to the lower edge of the body by fastening means thereby to provide said one piece suit, the jacket and trouser parts each having co-operable retaining means whereby, when the fastening means are released and the trouser part folded relative to the jacket part, the trouser part may be retained between the upper and lower edges of the body by said retaining means, whereby the garment may be worn as a jacket only.