The CALCA II orthotic blank is specially designed for use with chronically painful heel area complaints, e.g. plantar fasciitis or heel spurs. The particularly extensive, drop-shaped recess in the self-supporting Perpedes glass fiber composite shell is orientated on the plantar fascia’s anatomical location and stretches to the foot’s longitudinal arch. The moderate longitudinal arch support and the double layered PUR Slow Memory foam in the heel area have a dampening and pain relieving effect. The glass fiber composite shell can be optionally shaped due to its thermoplastic properties and can, therefore, be uniquely adapted to the user’s foot and requirements.