NIKE Women's Free TR 6 OC Unlimited Multi-Color/White 843988-999 Mesh Rubber sole Mesh, Rubber sole The tri-star outsole pattern expands and contracts in every direction, with your every step, to disperse pressure evenly and enhance flexibility and stability. Super-strong, ultralight Flywire cables hug your foot for dynamic support, loosening and tightening with your foot's natural motion. Breathable mesh lining in the forefoot Approx. 1 1/4" Heel height 3/4' Platform