For running on multiple terrains. Superior trail traction II: Using three sticky rubber compounds on the outsole increases grip and durability. The hardest, most durable rubber is on the heel, with a medium rubber up the center for increased traction. Run fast with confidence: Weighing just 290g and with a 4mm drop, this is a flexible and responsive shoe that allows quick running while still delivering protection, support and comfort. Cushioned ride: POWERFLOW midsole delivers 10% better shock absorption and 15% better energy return than standard midsoles. Get the perfect fit: Built around the natural anatomy of the foot, the new ADAPTERWEB met-cradle adapts to the natural movement and swelling of the foot in motion, while the Y-LOCK system holds the heel in place and offers support.