| CPC B64D 11/06205 (2014.12) [B64D 11/062 (2014.12); B64D 11/0641 (2014.12)] | 18 Claims |

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1. A cover attachable to an aircraft passenger seat, the cover comprising:
an upper layer comprising an inflatable bladder, wherein the upper layer spreads at least partially across a bed surface of the seat, and the inflatable bladder is configured so as to extend across at least 50% of the width of a knee region of the bed surface of the seat;
a lower layer connected to the upper layer, the lower layer spreading across a top of the bed surface;
a space between the upper layer and the lower layer configured to receive a passenger;
an attachment mechanism for attaching the lower layer to the bed surface; and
a trigger mechanism for triggering inflation of the inflatable bladder,
wherein the cover is arranged to cover a passenger in close proximity to the passenger when lying on the bed surface, and
wherein when the inflatable bladder is inflated, the cover is configured to provide pinning down force such that sliding of the passenger in a forward, a backward and a sideways directions is restricted.
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