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Zappos.com is proud to offer the New Balance - SD607 (Silver) - Footwear: This aggressive sprinting spike is built for athletes in sprinting events ranging from 55 to 400 meters and long jump during indoor and outdoor track seasons. ; Synthetic leather upper. ; C-CAP® lightweight, compression-molded EVA midsole provides cushioning and flexibility. ; Phantom Liner™ reduces abrasion and discomfort. ; Eight-spike configuration. ; Built on an RL-2 last. ; 6.00 oz. ; Product measurements were taken using size 8.5. Please note that measurements may vary by size.