Style#: FQ4155-100 Air Zoom units in the heel and forefoot add a spring to your step. Soft collar and padded heel give you comfort and security around your ankle. Extra rubber in the toe area, specifically the tip of toe, provides durability. High-abrasion rubber in the forefoot offers durability and traction. Whether you’re digging, dinking or trying to barrel a ball down the line after scrambling out of a split set, the all-new Nike Zoom Challenge can help you hold serve. Air Zoom units help keep you fresh when in the middle of a long rally or volley at the net, ideal for getting to untouchable shots both near and far.