I bought this, but my motor skills are so bad that I gave up on it and just stored it away. I was supposed to have a special bag for it, but it seems to have gotten mixed up somewhere, and it was put in a different bag... The main body itself has no signs of use and I think it can be used without any problems. Thank you very much! (*´▽｀*)! [Excerpt from the internet] Chacott [Chacott] [Chacott Official (chacott)] Training Sandals - Goopo (High Type) "Goopo is a training sandal that creates good posture." * [High Type] is suitable for junior high school students and older who are healthy. It is also suitable for those who want a higher effect. [Creating beautiful posture necessary for dance] ● It trains to create a beautiful posture necessary for dance by standing the pelvis. ● It makes it easier to do en dehors. ● It becomes balance training, and you can move your center of gravity beautifully, and you can walk beautifully with good posture and straight knees. [Improving dance skills by strengthening lower body muscles] ● Your back naturally straightens, and by using muscles you don't usually use, you can efficiently build muscle. ● The force of stepping on the heel increases, leading to improvement in jumps and turns. ● By firmly gripping with your toes, the arch of your foot is strengthened. [Reducing foot fatigue] ● When you can maintain the correct posture and use your foot muscles in a balanced way, you won't put extra strain on your feet, reducing fatigue. 《How to use》 Wear it correctly and walk, putting your heel on the floor. Be careful not to stand straight or walk with bent knees. Start by walking for about 5 minutes at first, and gradually increase the time. You can use it anytime, such as after a bath or between lessons. ● Size: Free (compatible size 22.0-28.5cm) ● Material: Artificial leather, urethane foam ● Country of origin: China