An extra-light orthosis includes a woven elastic fabric sleeve, shaped to exert compression forces on a member on either side of and on a joint, and a plate fixed onto an inner face of the sleeve to come into direct contact with the skin on the joint, the plate including an elastic fabric layer onto which a layer of polymer gel is adhered, an annular part shaped to surround the top of a joint protruding area, and a tab extending from an outer edge of the annular part, in an axial direction of the sleeve, the plate adhering to the skin such that, under the effect of the compression forces exerted by the sleeve, when the sleeve is longitudinally stretched, the plate remains stretched and applies tensile forces locally to the skin parallel to the surface of the skin, toward the center of the annular part and of the joint.