Iconic GEL-KAYANO(TM) design influences from the late 90s and early 2000s combined with modern cushioning properties. Classic laces In-Shoe Comfort The midsole features the same tooling system from the GEL-CUMULUS(R) 17 shoe. It's stacked with dual GEL(R) technology inserts and FLYTEFOAM(R) and FLYTEFOAM(R) PROPEL cushioning to help provide advanced impact absorption and bounce. Rearfoot and forefoot GEL(R) technology improves impact absorption