Originally introduced in 1991, the GRID SD delivers shock absorption and stability and style. This summer, the shoe has been upgraded with soft wolverine Silkee Suede uppers. The upper also incorporates a moulded forefoot, quarter straps and reflective material at the heel for a bold look.Features Include:Wolverine Silkee Suede upper with perforations for extreme breathability.Upper incorporates a moulded forefoot quarter straps and reflective material at the heel.Saucony's landmark midsole cushioning system G.R.I.D (Ground Reaction Inertia Device) is utilised.Shadow 5000 sole with an outer triangular lug system.