The Adrenaline GTS 22 maintains the same support level with the use of our GuideRails holistic support system. We updated the midsole by including a full DNA LOFT foam and integrating a segmented crash pad in the heel that allows for a smooth transition from heel to toe. We continue to use our 3D Fit Print material in the upper that creates a balance of stretch and structure to allow the shoe to move comfortably with your foot. Even more specifically, we integrated 3D Fit Print in the heel and saddle for a better fit.
The Addiction GTS 15 maintains the same support and cushion levels. We updated the support of the Addiction GTS 15 to include our GuideRails technology, this adds support to your feet, knees, and hips by keeping excess movement in check. So you can stay in your natural stride, even when you get tired. Plus the one-piece outsole keeps the shoe from flexing too much. We maintained a roomy fit with our unique forefoot construction that allows space for orthotics or feet that need a high-volume shoe. In addition, the upper includes the 3D Fit Print and Engineered Air Mesh materials to create the right blend of stretch and structure for supreme comfort.
The main difference is in the lasts between the two shoes. The Adrenaline GTS 22 is built on a curved last whereas the Addiction GTS 15 has a linear last. A linear last doesn't curve up as much in the toes so there is more volume in the toebox to accommodate inserts or orthotics.