C.C.F. CRISPI® Crossbow Frame brings an innovation on the shock absorbing system sole by associating the request of stability, comfort and technology in a high quality product. This insert made in plastic material follows a particular form in a waving module which offers a perfect stability, sustaining the foot and, at the same time, absorbing the shocks provole during the walk. Thanks to this function similar to a crossbow, this insert improves the braking even in the most difficult terrains.