Kyrie 4 Basketball Shoe - Black The Kyrie 4 Men's Basketball Shoe is ultra-flexible, responsive and supportive. It's designed for Kyrie Irving's sudden changes of direction and smooth yet rapid playing style. Flexible Traction The Flex Groove outsole has a zigzag cut-out along the bottom for excellent flexibility and traction. The sides of the sole are curved to enable smooth transitions and fast, fluid play. Responsive Cushioning Under your foot is lightweight foam with Nike Zoom Air cushioning in the heel. It provides soft comfort and a responsive feel with every move. Breathable Support Through the forefoot, mesh keeps air flowing to help your feet stay cool. And ultralight, super-strong Flywire cables provide support during sharp cuts.