A support device (1) comprising an outer envelope (2) impermeable to the passage of gases and adapted to define a volume of the receptacle (2a)； an outer envelope (4) permeable to the passage of gases, which defines an operating volume and adapted to be housed within said volume of the receptacle (2a)； a plurality of differentiated particles (6) disposed within said operating volume； separation means (5) suitable for dividing said operating volume into a plurality of subvolumes (5a), each containing said differentiated particles (6)； and at least one valve (7) adapted to create, before an order, a connection for the passage of fluids between said volume of the receptacle (2a) and the external environment so as to vary the extent of at least said subvolumes (5a) and defining an expanded configuration in which said differentiated particles can move freely within said subvolumes (5a), and a compressed configuration in which said differentiated particles (6) are compacted by defining a plurality of resistant elements (6a)； said support device (1) characterized in that said separation means (5) consist of separation partitions made of the same material as the operating volume.Un dispositivo de soporte (1) que comprende una envoltura externa (2) impermeable al paso de gases y adaptada para definir un volumen del receptáculo (2a)； una envoltura externa (4) permeable al paso de gases, que define un volumen operativo y adaptada para alojarse dentro de dicho volumen del receptáculo (2a)； una pluralidad de partículas diferenciadas (6) dispuestas dentro de dicho volumen operativo； medios de separación (5) adecuados para dividir dicho volumen operativo en una pluralidad de subvolúmenes (5a), conteniendo cada uno de ellos dichas partículas diferenciadas (6)； y al menos una válvula (7) adaptada para crear, ante una orden, una conexión para el paso de fluidos entre dicho volumen del receptáculo (2a) y el entorno exterior de manera de variar la extensión de al menos dichos subvolúme
