A fitting system (40, 80, 90, 100 or 110) configured for fixing a prosthetic device to a stump of an individual, the stump having a defined volume, surface and length between a proximal end and a distal end along a longitudinal axis, in which the fitting system comprises: a. a rigid support (2, 2A, 2B, 2C or 2D), the rigid support having a rigid member and a distal base (30, 30A, 30B, 30C or 30D), in which the rigid member is configured to extend as far as along the length of the stump, and in which the rigid member is shaped to fit between about 15% and about 75% of the stump surface, in order to define in this way, when in use, a remainder of the surface of the stump not supported by the rigid member (32, 32A, 32B, 32C or 32D)； b. a flexible non-rigid non-elastic support (4, 4A, 4B, or 4C) manufactured from one or more materials used to manufacture clothing, in which the flexible non-rigid non-elastic support is fixedly secured along its length. length to the rigid support and is placed, when in use, to cover the rest of the stump surface not supported by the rigid member, in which the rigid member and the flexible non-rigid non-elastic support are configured to cover opposite sides along the longitudinal axis of the stump； and c. an adjuster to maintain a volumetric adjustment of the stump fit system, in which the adjuster is directly attached to each of the rigid supports and non-rigid flexible non-rigid supports； in which, when in use, and when the adjuster has been adjusted to maintain a volumetric adjustment, the fitting system maintains hydrostatic weight support while changing the stump volume.Un sistema de encaje (40, 80, 90, 100 o 110) configurado para la fijación de un dispositivo protésico a un muñón de un individuo, teniendo el muñón un volumen, una superficie y una longitud definida entre un extremo proximal y un extremo distal a lo largo de un eje longitudinal, en el que el sistema de encaje comprende: a. un soporte rígido (2, 2A, 2B, 2C o 2D), tenie
