With outdoor racing in mind, the Puma Speed 300 S Disc running shoe offers lightness and speed needed to take on the competition. The breathable mesh, seamless upper, and perforated sock liner provide ultimate comfort for zero distraction on race day. A lace-free Disc Fit System lets runners achieve a personalized fit quickly. Upper: Flexible AirMesh upper provides exceptional breathability. Seamless overlays deliver lightweight and comfortable support. Lace-free Disc Fit System offers a secure fit on the fly. Midsole: Molded Ortholite® sockliner hugs the arch for support. A SpeedFoam midsole reduces weight and provides excellent energy return. Perforated, removable insole. Outsole:Forefoot flex grooves enhance flexibility. Propulsion Zone in the forefoot promotes quick turnover. EverTrack provides durability in high-wear areas.