Forefoot flex grooves for more flexibility, FuelFoam IMEVA Our soft EVA compound that balances first feel cushioning with responsiveness. Lightweight mesh material provides increased breathability, MemoryTech Comfort Footbed 8 MM COMBINATION OF LAZY MEMORYFOAM THAT CONFORMS TO THE FOOT AND A OPEN CELL RECYCLED FOAM TO CREATE A COMFORTABLE, CUSTOM FIT THAT REBOUNDS TO ITS ORIGINAL SHAPE EVERYTIME YOU WEAR THEM. products are made with recycled contents as part of our commitment to end the use of man made plastics, Reecycled textile upper materials.