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.​ Worn twice. Didn’t work with my type of feet.