Featuring breathable knit uppers, the ZEROGRAND Runner puts an of-the-moment athleisure spin on traditional ZEROGRAND designs. Proprietary Stitchlite upper for breathability, comfort and stretch. Ghillie (s shaped) lacing system helps to lock in the foot. Leather lace loops add a hint of craft. Soft molded TPU (rubber) cradles the heel for added support and stability. Ortholite memory foam footbed provides first feel comfort and great underfoot cushioning. Rubber heel and forepart (full rubber outsole) provides increased traction and durability Graphic design pattern and flex grooves on the bottom of the midsole allow for a visual aesthetic and increased flexibility; allowing for natural foot movement.