Fila Cage Delirium tennis shoes will ignite your passion for high performance with an unrivaled fit and confident traction. The PERFITSYSTEM creates a sensation of superior comfort as they wrap your feet in support and cushion. Play with full force in the stability and flexibility of these shoes.Upper: FLEXX CAGE® lightweight armored durable external cage provides flexibility and protection. PERFITSYSTEM fit perfectly to the feet, creating a sensation of superior comfort. Padded tongue and heel collar enhance comfort. Mesh offers access to breathability. Lace-up front provides an adjustable fit. Midsole: CAGE-AMH® anti-sprain midfoot shank enhances stability and support. SUPERACTION® EVA compound midsole provides cushioning, higher lightness, and great forefoot flexibility.Outsole: Ever-Grip gripping technology increases impulse and gripping. Four turning points strategically placed at the base of the sole allow for more agility and speed when changing direction, without compromising stability or control. Non-marking outsole.