Sierra SCS 101 men Casual Shoes

 The Future Is Now. WaveSpring Technology is here and it is coming to a shoe near you!

Spira's patented WaveSpring technology may be the most significant advancement ever achieved in the footwear industry.*

WaveSpring returns energy with every step.
Unlike traditional shoe midsoles made primarily of foams, rubber compounds, or polymers, WaveSpring technology stores and disburses energy with every step. Testing performed at Michigan State University in 2001 reported that 87% - 96% of the energy is returned from the WaveSpring. This is the highest energy return score for any midsole material ever tested.** As a result, our footwear not only cushions, but returns energy. In a very real sense, the WaveSpring enables you to recycle your own energy!

Sierra SCS 101