When adjustability is critical, this custom-molded back from Matrix Seating answers the call. The Micro-Modular Seating insert is capable of unlimited adjustments after the shape has been formed, and without requiring a heat gun. The back includes a removable shell, and its see-through insert design confirms contact between the user and the seat. A proprietary open-cell foam is soft to the touch, but maintains appropriate positioning, breathability and pressure relief. Coded E2617, the back has a breathable cover to reduce moisture.