The ROHO Hybrid Select Replacement Foam Base is our most advanced hybrid cushion that provides you with superior positioning and stability, plus the ability to offload by simply removing the IT air insert. You can easily find the right position for optimal immersion and skin protection by utilizing the exclusive ISOFLO Memory Control. This technology allows you to set the amount of air in the three separate ROHO compartments—the removable IT air insert and the dual-zone overlay.