Asics - Gel-Typhoon (White/Blue/Silver) - Women's: This awesome volleyball shoe features the proprietary ASICS I.G.S. (Impact Guidance System) to enhance the efficiency and performance of the foot in movements specifically associated with the sport of volleyball. I.G.S. (Impact Guidance System) combines all ASICS components to enhance the foots natural gait from heel-to-toe. Personal Heel Fit (PHF) memory foam lined heel collar molded to the athletes heel, creating a personalized fit. SpEVA - enhanced responsiveness. Ventilation sole for increased air flow into the shoe for temperature and humidity control. Shoe weighs 12.9 oz.