An occupant protection airbag device for a vehicle includes a housing having an opening and a closed end, a strut secured to the housing adjacent the closed end and extending from the closed end toward the opening, and an inflator supported by the strut adjacent the opening and spaced from the closed end to form a storage chamber between the inflator and the closed end of the housing. When the seat back is in a folded position, the anti-chuck hook of the latch rotates such that the seat may be removed from a striker in the floor of the vehicle. The ligand is preferably an antibody, F fragment, single domain antibody single chain antibody or a serum binding protein. A flexible sheet has a reinforced edge with varying thicknesses to accommodate different weight loads and abrasive conditions.