An adaptable protective device (1) is provided, suitable to include a portion of body to protect (100) comprising a main casing (20) impermeable to the passage of fluid, flexible and defining a main volume (21), said main casing (20) being suitable to be placed at least partially around said portion of body to protect (100) so that said portion of body to protect (100) is outside said main volume (21), said main casing (20) defining an inner surface (22) substantially in contact with said portion of body to protect (100) and an outer surface (23) not in contact with said portion of body to protect (100), an inner casing (30) placed inside said main casing (20), permeable to the passage of fluid and flexible； and comprising a plurality of filler particles (31), a first valve (24), suitable to form or interrupt a connection for fluid passage between said main volume (21) and the external environment, a closure casing (40) impermeable to the passage of fluid, flexible and comprising sealing means (41) suitable to create a fluid seal between said closure casing (40) and said portion of body to protect (100) thereby forming a closed volume (42) impermeable to the passage of fluid and including said main casing (20) and said portion of body to protect (100).
