Amazon.com: Bariatric Wheelchair Seat Cushion with Gel Infused Memory Foam - 24" x 20" x 3" - Orthopedic, Coccyx, Tailbone Support - High Resilience for Positioning and Stability - Prevents Pressure Sores :
Protekt Bariatric Foam Wheelchair Cushion with Straps - 24" x 18" x 4" - Walmart.com
Bariatric Memory Foam Cushion - 24"W - Model 553087
K7 Bariatric Manual Wheelchair (24") - Accessibility Medical Equipment ®