The light and fast Surge has a smooth transition and is ideal for fast training or racing. Cushioning + Lightweight •Full blown rubber outsole with carbon rubber heel crash pad •Forefoot Flex Groves for a smooth transition •SKYDEX® Heel crash pad •High rebound forefoot foam for energy return •High performance dual density EVA insole •360° degree reflectivity •Weight - Size 7 9.2oz/260g