The GEL-KAYANO 31 is an advanced running shoe designed for distance running from 5 km to the marathon. It offers an optimal combination of stability and cushioning for a comfortable running experience over long distances. The new 4D GUIDANCE SYSTEM provides adaptive stability for a more balanced stride during training. The midsole has been redesigned and equipped with FF BLAST PLUS ECO cushioning, which consists of around 20% bio-based materials and supports comfortable runs. PureGEL technology under the heel provides lightweight cushioning and softer landings, while the innovative knitted stretch upper ensures improved breathability. The external heel counter provides stability and a comfortable stride, while the OrthoLite X-55 sockliner improves comfort. Reflective details improve visibility, and the AHARPLUS heel counter improves the durability of the outsole. At least 70% of the upper is made from recycled materials to reduce waste and CO2 emissions. The sockliner is made with an environmentally friendly solution dyeing process. In addition, the GEL-KAYANO 31 is vegan-friendly and uses no animal materials in the design and material selection.