A vehicle passenger seat with an upholstery cover having a fabric seam designed to absorb energy from a seat occupant upon impact. Means for progressively absorbing energy from the seat belt occupant are disclosed. Use of the fabric seam to absorb vehicle passenger seat occupant energy increases the survivability of an impact for an occupant of a seat with a separate inner and outer seat frame, and relates to compliance with energy absorption requirements for seat-backs of 49 C.F.R. Section 571.222 (FMVSS 222) and seat belt anchorage loading strength requirements of 49 C.F.R. Section 571.209 and 571.210 (FMVSS 209 and FMVSS 210).