Asics Gt-2000 13, as the name Suggests, is the 13th Edition of the shoe, but this time there have been major Changes in the Shoe's Expression. Gt-2000 13 is still a Stability shoe, but now with a new 3D Guidance System to offer this Stability. It's a more Adaptive Support that Adjusts According to your Running style. This 13th Edition of the shoe has been Updated with a more Breathable upper, as well as some extra added foam Material in the Forefoot. The Platform of the shoe is also wider, again to Create Stability. The Midsole has also been Updated, in this Edition Incorporating FF Blast+ Material, as well as Puregel in the heel. Gt-2000 13 has an 8mm heel drop.