Dragonfly White/BlackSpeedlight foam (SLF) midsole is extremely responsive with super high energy return. Super critical foam insert in forefoot for exceptional rebound. Dragonfly is equipped with a shock absorption heel pad insert (SA+) to minimize high impact forces. Revolutionary outsole technology NexX4 have 4 key advantages; extreme grip, extremely durable, extreme lightness and reduction of carbon footprint by 50%. Speed & Agility Defined; Revolutionary NexX4