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.
Heel Technology: WaveSpring--Returns energy with every step, is light and compact, and designed to not breakdown. WaveSpring provides a superior blend of cushioning through deflection of the steel alloy spring midsole system combined with efficient energy return for optimal performance.
Lacing System: Traditional Lacing System--Traditional lacing system provides a tighter fit, for more centralized support.
Model Number: SLT511
Classification: Cushioning

Product Description
Spira's Del Sol 2 running shoe for men is ideal for neutral, fast runners seeking a lightweight, flexible performance shoe. It incorporates additional medial support in the upper without sacrificing comfort and fit. The WaveSpring design in the heel provides exceptional protection against impact shock and fatigue.

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