Engineered knit upper wraps the foot with a soft feel while improving breathability PureGEL technology helps provide lightweight cushioning and softer landings OrthoLite X-55 sockliner improves step-in comfort Reflective details designed to improve visibility in low-light conditions AHAR outsole rubber improves durability The GEL-NIMBUS 25 shoe's soft cushioning properties help you feel like you're landing on clouds. This neutral trainer is revamped with new materials that create a softer and smoother running experience. A soft knit upper comfortably wraps your foot while supplying advanced ventilation. Its updated knit tongue construction provides better flexibility and extends around the ankle for a more luxurious fit and feel. The midsole is packed with the most cushioning that the series has offered to date. By adding more FF BLAST PLUS cushioning and using ASICS's new PureGEL technology, this trainer creates a lighter and softer cushioning experience.