UPPER: DYNAMIC INNER BOOTIE KEEPS THE FOOT SNUG WHILE THE DULL PULL WEBBING WRAPS THE FOOT AND KEEPS IT CENTERED ON THE FOOTBED. MIDSOLE: NATURAL MOTION FREE FLEX COMBINED WITH A 2 FOAM SYSTEM. CUSHLON ST PROVIDES THE COMFORT, WHILE PHYLON KEEPS THE PLATFORM STABLE. OUTSOLE: SOLID RUBBER PODS WITH DELTA NODES IN JUST THE RIGHT PLACES FOR OPTIMAL TRACTION. PROFILE: A STRONGER, MORE CUSHIONED FREE FOR THE ATHLETE WHO WANTS A LITTLE MORE IN HIS TRAINING SHOE.