The Monitor REHA is a built-in back cushion designed for those who have a round back and are easy to move forward. The V cut on the back reduces the pressure of your spine, and the seat anchor shape prevents any shifting and the pelvic support shape provides a stable sitting experience. It is a one-piece cushion, so there is no need to adjust it, just place it on the wheelchair to use. Exgel is placed on the side of the pelvis and the sciatica area where pressure is applied, and the exgel disperses pressure and gently supports the body. The V-cut relieves the pressure of the spine and the tailbone pocket is designed to reduce the contact and pressure of the tailbone. The shape supports your pelvis from left and right to stabilize your core. This product comes with a custom washable stretch cover. The included stretch cover is made of a smooth fabric that prevents stuffiness. The underside of the seated surface has an insulating layer for comfort. Waterproof film is also laminated The bottom has been treated to prevent slipping, so it supports a stable sitting position. The material of the cover passes the fire retardant test (CA Technical Bulletin 117) required by medical equipment in the United States.