Bariatric Wheelchair Seat Cushion w/ Gel Infused Memory Foam - 28" x 20" x 3" Instead, expect a decrease in pressure sores, proper pressure redistribution, and deep pelvic immersion. No more pressure sores, or gel migration. Turn your everyday wheelchair or desk chair into a premium seat. This cushion is made of high quality breathable and fluid resistant material and can be used in any sitting situations.