I purchased this new. It didn't fit the chair I intended to use it on, so I've kept it stored unused. It's made of breathable material and can be washed with water. Size: Approximately 40 x 36 x 4 cm - Gel cushion - Inner cover - Cover with string I will pack it in the box shown in the photos and ship it via anonymous delivery. Gel cushion Honeycomb structure Lower back pain Posture Office Remote work