A lightweight, breathable mesh material that reduces the need for additionaloverlays; 4D GUIDANCE SYSTEM feature; Midsole foam that provides a blend of cloud like cushioning and a responsive ride that is lighter than FF BLAST Technology; Reflective details - Designed to help improve visibility in low-light conditions; Knit heel pull tab - This comfortable heel tab makes the shoe easier and more comfortable to put on and take off; Rearfoot PureGEL technology - Softer, updated version of Asics' GEL technology. Approximately 65% softer vs standard GEL technology; OrthoLite X-55 sockliner - Premium sockliner that provides cushioning performance and moisture management for a cooler, dryer environment; HYBRID ASICSGRIP outsole - Combines ASICSGRIP rubber and AHARPLUS materials to help provide advanced grip for various terrains and advanced durability