Customizable relief from heel and arch conditions with customizable heel heights. Compete with: Two sets of Snap-On heels, one set for heel posting and one for heel height discrepancy. Unique Snap-On 0neutral 2 or 4 heel post options. Unique Snap-On heel heights of 1/8" or 1/4" Firmer medical grade support shell Double-layered shock absorbing Poron/EVA cushion Insole