The Gel-Kayano 30 was developed to offer advanced stability and softer cushioning properties - from 5 km runs to marathons. The 4D Guidance System provides adaptive stability. This helps you to experience a supportive and balanced stride during your long distance training. The midsole has been redesigned with FF Blast Plus Eco cushioning and a 4 mm increase in stack height. With approximately 20% bio-based content, this material provides cloud-like softness with every step. The PureGel technology is strategically positioned under the heel for a softer ride. It's 65% softer than traditional visible Gel technology, so your long-distance training will feel amazingly soft.