Tests show that  Springbak Springsoles will consistently deliver an astounding 80% resiliency. Other insoles measured only 16%-23%.
 
This means that a ball bearing dropped on the Springbak Springsole will bounce to an unbelievable 80% of its drop height!

When inserted, Springbak's patented Springsole insoles always increase core body strength immediately, by raising the Vibration Frequency of the human body, thus increasing the speed of the body's electromagnetic system. This in turn speeds up your body's electrical currents which are the vehicles that send messages to the brain & back to the muscles, thus allowing you to pull more energy from your own power plant - the human body.