This garment (100) allows the effective and high-performance application of a post-operative treatment support. To this end, it comprises pieces of material (110.1, 10.2), which each consist of a first warp and weft fabric, stretchable in the warp and weft directions, having substantially uniform stretchability in the warp and weft directions, with a maximum warp elongation of at least 50% and a maximum weft elongation of at least 50%, and which are assembled together to give the garment a functional configuration such that the pieces of material have respectively inner (110A) and outer (110B) opposing faces, and are applied by their inner face directly to a patient's body, exerting compression in a uniform manner on the patient's body. Moreover, the garment comprises at least one yoke (130), which consists of a second warp and weft fabric, stretchable in the warp and weft directions, having substantially uniform stretchability in the warp and weft directions, with a maximum warp elongation of at least 50% and a maximum weft elongation of at least 50%, and which is assembled to the pieces of material, being attached flat to the outer face of the pieces of material and being situated in a predetermined part of the garment, intended to cover an operating area of the patient's body, so as to exert additional compression in a uniform manner on this operating area.Ce vêtement (100) permet d'appliquer de manière efficace et performante une contention de traitement postopératoire. A cet effet, il comporte des pièces d'étoffe (110.1, 10.2), qui sont chacune constituées d'un premier tissu chaîne et trame, extensible en chaîne et en trame, en présentant une extensibilité sensiblement homogène en chaîne et en trame, avec un allongement maximal en chaîne valant au moins 50% et un allongement maximal en trame valant au moins 50 %, et qui sont assemblées entre elles pour donner au vêtement une configuration fonctionnelle de sorte que les pièces d'étoffe présentent des faces oppos
