A vehicle seating assembly includes a seatback. A back panel includes a front closeout panel. A carrier supports the seatback and includes an upper thoracic region having a peripheral support. A peripheral gap is defined between the front closeout panel and the upper thoracic region. A bottom portion of the upper thoracic region includes a lower wall having a sinusoidal configuration. A lower lumber region includes a peripheral support. A peripheral gap is defined between the front closeout panel and the lower lumber region. An upper portion of the lower lumbar region includes an upper wall having a sinusoidal configuration. A plurality of concave connectors couple the lower wall of the upper thoracic region with the upper wall of the lower lumber region.