The Nike Flex TR8 Women's Training Shoe is designed for high-intensity, cardio-heavy training inside or outside the gym. It features lightweight mesh to keep air flowing and exceptional support for quick side-to-side movements. Breathability Durable mesh provides lightweight breathability when your workout heats up. Support Ultralight, super-strong Flywire cables integrate with the laces for exceptional support as you move from side to side. Traction Deep grooves and a tri-star pattern allow the sole to flex naturally with your foot. Rubber pods in high-wear areas offer durability and multi-directional traction.