Introducing Flexion Ride technology from Saucony. The Sinister is a lightweight running shoe that incorporates a flexion plate designed to naturally propel runners onto their forefoot. Combines a great fit and responsive cushioning for a more efficient running gait. Flexion Plate provides a more efficient heel-to-toe transition. Injection-molded EVA midsole offers increased shock attenuation, responsive cushioning and durability. Visible rearfoot Grid® System adds superior cushioning and stability by centering the heel on impact. HRC™ Strobel Board increases cushioning and step in comfort. Wt. 10.3 oz.