🛋️ Sit Smart, Live Better! Perfect for office, car, wheelchair, and home seating. Breathable, washable cover with non-slip bottom for convenience. Unique cut-out design reduces pressure on spine and tailbone. High-density memory foam contours to your body for optimal support. Alleviates discomfort from sciatica, herniated discs, and more. High density foam Washable cover 18" x 16" x 3.5" The FOMI Extra Thick Donut Memory Foam Seat Cushion is designed to provide unparalleled comfort and support for those suffering from tailbone pain, sciatica, or other discomforts. With its unique cut-out design and high-density foam, this cushion promotes proper posture and alleviates pressure, making it ideal for use in various settings, from office chairs to cars. The breathable, washable cover ensures hygiene and ease of use, while the non-slip bottom keeps it securely in place.