Amazon.com: Jump99 J99 Flex Ultra Strength Plyometric 。* WHAT IT IS: Jump99 Men’s Size 11 Black Vertical Jump Training Shoes Plyometric Basketball Trainers. Specialized forefoot-loaded athletic training shoes designed to help improve explosive toe drive, vertical leap training, first-step quickness, and plyometric conditioning drills. Elevated front jump platform encourages athletes to stay on the balls of their feet during basketball training workouts. Rare larger men’s size 11 pair. Great for basketball conditioning, agility drills, explosive movement training, and gym workouts. * CONDITION: Very good pre-owned condition. Light overall wear from normal training use. Jump platforms, tread, uppers, and interiors remain in very good condition. Some age-related discoloration/yellowing present on portions of the jump pad bottoms as shown in pictures. No major damage noted. Please see all pictures as part of overall condition. * MEASUREMENTS: Men’s US Size 11