Asics Gel Kayano 32 Morganite/Pearl PinkSize & Fit Guide FF BLAST PLUS foam midsole is combined with a higher midsole stack height while reducing it's weight to provide a more balanced experience making your training feel smoother and more comfortable. A reinforced tongue wing along the arch also provides additional comfort and support. The 4D GUIDANCE SYSTEM helps provide adaptive stability. This helps you experience a more supportive and balanced stride during your distance training.