The Saucony Grid Launch running shoe utilizes Propel technology for dynamic cushioning, maximum deflection on impact and optimal forefoot flexibility. Breathable mesh upper. HRC strobel board increases cushioning and step in comfort. Full-length Propel technology provides maximum deflection on impact and optimal forefoot flexibility. Visible rearfoot Grid™ system offers superior cushioning and stability by centering the heel on impact. TPU shank. XT-900® carbon rubber outsole adds exceptional traction properties without sacrificing durability. Wt. 11.0 oz.