From 5ks to full marathons the gel-kayano 30 shoe is designed to provide advanced stability and softer cushioning properties. the new 4d guidance system helps provide adaptive stability. This helps you experience a more supportive and balanced stride during your distance training. its midsole is revamped with ff blast plus eco cushioning and a 4mm stack height increase. With approximately 20% bio-based content this material helps create cloud-like softness in every step. the new puregel technology is strategically positioned below the heel for a smoother ride. It's 65% softer than conventional visible gel technology allowing your distance training to feel surprisingly smooth.