Abstract: An acceleration protection ensemble protects a person aboard an aircraft from the effects of acceleration. One embodiment comprises a liquid impervious cavity having a flexible interior layer that presses against the body. The cavity substantially covers the person's shins, front thighs, chest and back, and behind the knees, and leaves the buttocks, arms, and rear calves, and thighs substantially uncovered. Hydrostatic pressure within the cavity is restrained by a exterior restraining layer of flexible indistensible material. Substantially all of the cavity is positioned between the body and the restraining layer. The restraining layer substantially covers the buttocks, and rear calves and thighs to provide a pressure panel against body parts not covered by the cavity. The filled cavity hydrostatically presses body parts under it and tensions the pressure panels to press body parts underlying the panels.