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ASICS GEL-Kinsei 4 : Neutral. With ASICS'® top technologies for a supremely comfortable ride, the Kinsei® 4 is now lighter than ever for the best ride ever. The mosaic color pattern is unique to the right and left shoe and will definitely be turning heads whether it is race day or training day. The GEL-Kinsei® 4 accommodates runners with gaits ranging from mild underpronation to moderate overpronation. Upper: Air mesh upper with lightweight synthetic overlays for breathability with support. Biomorphic Fit® system places stretch material strategically on the upper to help reduce buckling and the potential for irritation. P.H.F.® (Personal Heel Fit) features two layers of memory foam that line the collar and mold to the athlete's heel, creating a personalized fit. Cuprothermo design's metallic film retains heat in cold weather and releases heat in warm weather. 3M reflective materials are designed to enhance visibility during low light hours. Less