Rearfoot additions are applied when extra rearfoot control is needed (more than the 5° inversion built into ICB Orthotics). They can be used to reduce patient's pronating over the arch of the orthotic. Available in 2° and 4°, packs of 2 or 10. Rear foot posting. Before heat moulding the orthotic, attach the addition to the medial aspect of the plantar surface using double sided tape provided. Then proceed with the heat moulding process. 2 degree and 4 degree varus additions can be used to increase the inversion when moulding to the neutral calcaneal stance position. Rear foot wedges can be used to reduce patient's pronating over the arch of the orthotic.