Opened for inspection, item is defective due to warping As shown in the photos, the item is slightly warped. It should still be usable. Thank you for your understanding. This item has a three-dimensional design that makes it easy to naturally engage the muscles around the pelvis just by sitting on it. The bulge in the center gently stimulates the pelvic floor muscles (PC muscles). Simply place it on your usual chair or the floor to incorporate self-care into your daily "sitting time." Recommended for those concerned about posture or those who want to be mindful of their hip line. Can be used during "multi-tasking time" such as desk work, housework, and watching TV. Lightweight and compact, making it easy to use at home or in the office! A self-care item that can be started without special knowledge or skills, even for those who are not good at exercise.