Some clients do not need to be positioned so much as made comfortable, and the Dreamline S3 is built around that. The foam is cube cut, so it breaks into small blocks that give way individually and let the back settle down into the surface. For a client who sits for long periods and has minimal postural needs, that softness is the whole point.
It is a thick, forgiving back support, and it still leaves room for correction. The BAC system works with it, so a therapist can build out for an asymmetry without giving up the comfort the client came for. That makes the S3 workable for someone whose shape has settled unevenly but who will not tolerate a rigid contour.
Fixed hardware keeps the set-up where it was put, which suits a chair that stays assembled and a client who does not need to remove the back.
