The Nike Air Zoom SuperRep 'Anthracite' is a high-intensity interval training (HIIT) shoe featuring a dark grey/black colorway, built with a stretchy mesh upper, a full-length stability plate, and responsive cushioning from two visible Zoom Air units in the forefoot and Cushlon foam in the heel, designed for explosive movements like jumps, lunges, and burpees with excellent support and flexibility for circuit training