This version of ULTRA comes with PUMA's brand-new SPEEDSYSTEM outsole and FastTrax stud design for explosive traction. Three rounded studs on the lateral side let you switch between firm ground and artificial grass. Wherever you play, play at full throttle. FEATURES & BENEFITS ACCELERATION: The SPEEDSYSTEM outsole design combines a high-performance fibre base material with a revolutionary stud system, maximising energy return for faster acceleration TRACTION: PUMA's FastTrax studs are complemented with more rounded studs on the lateral side for the most optimal traction on both firm ground and artificial grass STABILITY: The lightweight support frame stabilises the foot inside the boot to enable rapid changes of direction