NIKE Zoom Breathe 2K12 Tennis Shoes DragOn technology - for support, durability and stability at the upper. Nike Zoom unit - for low-profile, super-responsive cushioning. Unique lacing system - extends to the midfoot with specialized loops that help lock the foot into place. XDR Rubber - To provide extra traction. Lunarlon cushioning - gives you a plush, bouncy ride when hitting that court.