Nike Fastflex technology with rubber studs creates flexibility and traction for bursts of speed, quick cuts and sudden stops. The outsole has Nike Fastflex technology to help you move with ease while hitting the gas and changing direction on a dime for all those game-changing plays BenefitsNike Fastflex technology with rubber studs creates flexibility and traction for bursts of speed Synthetic leather on the upper is durable and easy to clean. Stay one step ahead of your opponent in the Vapor Shark 3. The outsole has Nike Fastflex technology to help you move with ease while hitting the gas and changing direction on a dime for all those game-changing plays.