The Nike Air Zoom Ultrafly QS London is the most innovative tennis shoe yet. Taking inspiration from other sports like track and field and American football, this adaptation creates a look and feel like nothing else. A Flyknit cuff around the ankle creates a secure yet sock-like fit while the low profile makes for superior movement on the court. This unique colorway and pattern are designed for the ATP World Finals in London.Upper: Extended, Flyknit ankle collar replaces the tongue and wraps the midfoot for a snug, sock-like feel and lightweight stability. Breathable mesh infused with Kurim overlay provides streamlined support to help facilitate natural movement with maximum speed. Midsole: Nike Zoom Air and Pebax® plate in the heel provides lightweight, responsive cushioning. Removable insole. Outsole: Outsole rubber wraps up at the toe to protect this high-wear area. A modified herringbone pattern offers incredible traction during aggressive moves on hard courts.