These shoes have built-in, flat springs under the heel and the ball of the foot. The springs are imbedded in the mid-soles so the springs are not visible. The shoe looks like a normal shoe and only you will know why you have a spring in your walk.
According to Ray Fredericksen, President, Sports Biomechanics, Inc.:ShoeSpring has the highest energy return of any shoe technology we have tested. The spring returned 87% - 96% of the potential energy. ShoeSpring functions more like the natural biomechanism of the human foot to store energy during foot contact and release it efficiently during propulsion.
Visit the Spira web site by clicking on the photo on the right.
There you can learn more and read testimonials from customers,
coaches, and users with special needs. The photo shows a Spira walking shoe
- you can see it is a normal shoe
with NO VISIBLE SPRING!
The photo on the right, shows a cut away of the shoe with the springs under the heel and the forefoot