Flex Cushion Purpose: This tool is designed to make it easier to stretch the muscles around the pelvis and hip joints. Effects: It helps to tilt the pelvis, supporting stretching in the correct posture, which can improve muscle flexibility, prevent lower back pain, and contribute to the development of beautiful posture. Materials: The cover is made of synthetic leather and polyester fabric, and the inside uses urethane foam, etc. Size: Approximately 40 x 40 x 20cm