The Adizero spear shoes have a textile upper and pre-shaped Velcro fasteners over the laces, as well as spikes in the forefoot and forefoot area. They have an EVA midsole and metal spikes. The outsole with shark leather texture provides grip. Weight: 368 g (size 42 2/3); running shoe: ashtrack; drop: 1 mm (rear foot height: 14 mm / forefoot height: 13 mm); recommended for: javelin throw