it fits various seats like office chairs, car seats, and airplane seats and is on the HSA and FSA eligible items only list. Features: Doctor Recommended Support Comfort: Watch our video endorsement to hear why experts recommend this product. Our memory foam seat cushion offers exceptional comfort and support, reducing tailbone pain and promoting healthy posture. Ideal for long sitting sessions. 100 Percent Memory Foam Cushion: Made from premium, 100 percent memory foam, our cushion ensures lasting durability and consistent support. Ultimate comfort as a gaming chair cushion, desk chair cushion, or wheelchair cushions Soft Breathable Cover: Our seat cushion for car features a machine-washable, breathable cover that is easy to clean. The non-slip bottom keeps the butt pillow in place, ensuring stability and comfort Pain Relief Body Support: The ergonomic "U" shape cutout minimizes tailbone and lower back pain, supporting spinal alignment and enhancing comfort while minimizing gravity's impact on the spine Versatile Durable: Ideal for office, home, and travel, it fits various seats like office chairs, car seats, and airplane seats and is on the HSA and FSA eligible items only list. Our sciatica pain relief pillow keeps its shape over time Package Includes: 1 x OfficeChair Cushion Listing and template services provided by inkFrog