The Speed Star K VI offers premium performance with an emphasis on plush cushioning and support. Very soft kangaroo leather is used in the upper along with a unique ventilation system to provide step-in comfort, breathability and more than sufficient stability. Axeler Heel Propulsion technology propels your foot with exceptional energy return while also maximizing shock absorption on every step. The durable rubber outsole plays great on any court surface and is backed by a six month durability guarantee. Sure to satisfy the needs of even the most elite players, this premium all-around offering has a near perfect blend of comfort and performance!