SCULPTED FOAM SEAT CUSHION provides comfort and support by turning any uncomfortable office chair, car seat or wheelchair into a comfortable area to sit with durable support SEAT CUSHION is constructed of medical grade egg crate foam to help reduce or heal pressure sores by taking weight off sensitive areas and improving air circulation CHAIR CUSHION is great for using on office chairs, kitchen chairs, car seat, wheelchairs or recliners to help reduce back pain, hip discomfort, sciatica, pregnancy back pain, herniated discs, tailbone injuries and hemorrhoids ERGONOMIC LUMBAR CUSHION PROVIDES SUPPORT from the bottom up for everyday use or after surgery or injuries. The convoluted cushion surface helps add padding and cushion to any surface. It's made with a non-skid material that stays in place and won't move around CHAIR PILLOW SIZE: 18 x 16 x 4. Medical grade foam is spot clean only