Spira Women's Genesis2 Mesh Running Shoe

The Genesis II combines Spira's engineered cushioning technology and proven stability features in one shoe. The unique WaveSpring technology, found in both the heel and the forefoot, provides unsurpassed cushioning and energy return while providing a stable platform for runners
The WaveSpring does not breakdown and maintains like new cushioning performance throughout the life of the shoe, while reducing impact shock, stress and fatigue. The midsole design incorporates a special flex plate for increased flexibility and a firmer density medial post and external shank for support, which works with the highly supportive upper design to resist over pronation dynamics.