Designed, developed and tested with the world's fastest sprinters. The Nike Zoom Superfly R2 is a technical sprint track shoe with a supportive lockdown. Simple synthetic two-panel body construction provides snug fit. Forefoot strap and midfoot strap to lock the foot down on the plate. Thin Phylon™ midsole wedge. Platform sprint plate with eight receptacles and adapters. Lightweight Phylon™ outsole heel pad and minimalistic forefoot pad. Wt. 8.0 oz.