HD Home Office Lumbar Posture Hip Support Cushion Memory Foam Tailbone Seat Mat Special ergonomic arc design match your hips/buns. Better for your health! Woolen cover with zipper & elasticated belt Extents from the base of the spine up to the lower-mid point of the back Excellent for improving your posture , reduce stress to the back and alleviates lower back pain The contoured shape ensures an anatomically correct posture for long term benefits