The Head Men's Sonic Low enjoys a long, successful heritage in racquetball and is one of the best-selling shoes of all time. The Sonic's lightweight, durable upper coupled with Head's Cooling System™ provides state-of-the-art moisture management and creates a dynamic "climate control" system within the shoe. Revolutionary Comfort Grid technology provides both cushioning and energy return from the midsole to power the athlete needing great shock absorption and support. Gum soles on a Radial Contact™ outsole provide outstanding maneuverability and ensure constant traction and stability for exceptional performance.