SpEVA – A lightweight EVA midsole material that increases bounce-back characteristics while decreasing midsole breakdown. Asics uses SpEVA in almost all of their models.
Solyte- A lighter weight midsole material that Asics traditional EVA and SpEVA. Aslo features enhanced cushioning and durability.
FluidRide- The latest evolution in Asics midsole technology, FluidRide provides the ultimate combination of bounce back and cushioning properties with reduced weight and exceptional durability. This material will be found in most newer, high end models of both Structured Cushioning and Cushioned models.
FluidAxis- Anatomically correct deep flex grooves have been aligned to the joints of the foot. This innovative construction enables the shoe to recognize, adapt, and respond to the athlete’s exact load and positional change from first impact to toe-off.
DuoMax Support- A dual-density midsole system positioned to increase support and stability. Found in lower end Structured Cushioning models.
Dynamic DuoMax Support- Evolution of the DuoMax support enhances stability and support, with reduced weight and increased comfort. You will find this type of support in higher end models of the structured cushioning line of shoes.
F.A.S.T. Drop- Similar to the geometry seen in racing flats, a low heel-toe differential reduces midsole weight to improve economy and encourage faster running. Heel-toe offset is 6mm.
Trusstic System- Reduces the weight of the sole unit while maintaining the structural integrity of the shoe.
- See more at: http://www.runningshoesguru.com/2013/11/understanding-the-asics-running-shoes-lineup/#sthash.MCwwH4kd.dpuf