Nike Lady In-Season TR Fitness Cross-Training Shoes Synthetic and textile upper - for a comfortable, lightweight fit, keeping your feet comfor Midfoot overlay - that works with the laces for a snug fit, keeping your feet safe and sec 15mm-thick memory-foam sockliner - for extra cushioning and bounce. Deep flex grooves - that extend to the midsole for enhanced natural range of motion when w Durable heel counter - keeps the heel locked into place for added stability and support