Opened for inspection. This item is slightly warped, making it a "defective" item. Also, it will be shipped via non-standard mail, so please allow extra time for delivery. 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 central bulge 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 desk work, housework, watching TV, etc. 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.