SHADOW MOC_CHAPTER 1 1G FSDX MEMORYFOAM NUBUCK _STONE ISLAND SHADOW PROJECT WITH ECCO®: Shadow Moc in FSDX Memoryfoam nubuck. Memory foam is a responsive foam layer guaranteeing comfort and unusual high energy absorption, while remaining soft and pliable. Combining these features with ECCO® Ultra Soft technology by fusing, results in this uber-soft and spongy nubuck leather, that when touched, sinks in softly and then slowly recovers to its original shape and form.