Shock Doctor’s X-Active shoe insole has an Air/FX top cover that reduces friction and controls odor with anti-microbial protection. Its next two layers of Shockdome Technology help absorb more than 90 percent of shock. Directly below is Shockshell protection from heel to toe, allowing the insole to wrap around the foot. The fifth layer is a second shell with built-in control bar for extra support and stability, and the bottom layer is a shock pad that absorbs more than 90 percent of impact shock. Shock Doctor also has Ultra Arch Adjust and Trim Free insoles. All are available in men’s and women’s sizes.