Design: FitSync 360deg fit system comfortably encircles the player's foot Laces provide a secure fit and can be adjusted to modify the level of support provided FlexCore Motion provides 3 strategically placed flex grooves that align with the natural movement of your foot during running and jumping LandingSync Tech anti-ankle roll technology allows the shoe to flex naturally with your foot during landings, which can significantly reduce the likelihood and severity of ankle injuries Durability & Traction: SwiftStep outsole is engineered to support every movement a volleyball player makes, providing enhanced traction