Midsole Material: Compression Molded EVA--The EVA material is heated, reducing the density, thereby making it lighter.
Cushioning Technology: WaveSpring--Provides cushioning and energy return while centering the foot during the stride. According to Spira, an independent laboratory study conducted at Michigan State University confirmed the benefits of WaveSpring technology. The test revealed that WaveSpring provides a superior blend of cushioning through deflection of the steel alloy spring midsole system combined with efficient energy return for optimal performance.
Outsole: High-Abrasion Rubber --High-abrasion rubber oustole offers durability.
Lacing System: Traditional Lacing System--Traditional lacing system provides a tighter fit, for more centralized support.
Model Number: SRL202

Product Description
The women's Spira Volare II Cushion running shoe incorporates WaveSprings technology in both the heel and forefoot for incomparable cushioning and energy return. The deflection nature of the WaveSpring maintains "like new" performance throughout the life of the shoe. The outsole grade EVA forefoot cushioning elements delivers added cushioning, while the internal shank support provides increased midfoot stability.

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