Rekindle your passion for fitness and health with the comfortable and stylish Spira Phoenix training shoes. Predecessor: N/A. Support Type: Neutral. Cushioning: High energizing cushioning. Surface: Road. Differential: N/A. WaveSpring Technology Unique design integrates lightweight, stainless steel springs, one in the heel and two in the forefoot. Springs provide both shock-absorbing cushioning and return of up to 96 percent of energy Mechanical cushioning is designed to reduce stress on joints. Designed to last for the lifetime of the shoes. Breathable mesh upper with no-stitch synthetic overlays. Traditional lace-up closure. Stretch bootie construction offers a comfortable sock-like feel. Pull-tabs on the tongue and heel for easy on-and-off. Molded heel counter adds stability to the heel. Dual-density molded EVA midsole reduces impact. Dual-density Ortholite insole. High-abrasion rubber outsole provides reliable traction. Imported. Measurements: Weight: 12 oz Product measurements were taken using size 9, width D - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.