Pelvic correction cushion to support posture. Thank you for viewing. Used only a few times and has no noticeable stains. Purchased in 2025. Selling because my environment has changed. Purchased for around 10,000 yen. Price is not negotiable. After trying various cushions at Hands, this one provided the most natural support without any discomfort. Highly recommended for those who want to sit with good posture. No box or instruction manual.