basket 20 is preferably designed such that it is naturally biased in a retracted position for example by making it at least in part out of elastic material the lumbar support basket 20 preferably has a number of through holes as depicted the sides of the lumbar support basket 20 are hingedly attached to the two pivot wires 76 77 respectively as best seen in fig2 the pivot wires 76 77 are in turn hingedly connected to the four pivot plates 70 71 72 73 two on each side two pivot plates 70 71 72 73 are connected to each bolster wire 78 79 on its respective side the pivot plates 70 71 72 73 connect to the bolster wire 78 79 preferably at a middle portion of the bolster wire 78 79 on its respective side outer portions of the two bolster wires 78 79 are fixed to the two bolster paddles 30 31 respectively inner portions of the two bolster wires 78 79 are hingedly attached to the two slider assemblies 90 91 respectively the two slider assemblies 90 91 are slidable with respect to the center bracket assembly 60 the two bolster paddles 30 31 are fixed to the two trim wires 80 81 respectively the two trim wires 80 81 are slideably connected to two clips 82 83 which are attached to a seat frame not shown the two pivot plates 70 71 72 73 are also hingedly connected to the hinge wire 74 75 on its respective side the two hinge wires 74 75 are both hingedly connected to opposite sides of the center bracket assembly 60 as best seen in.