Used a few times. There are few scratches as I didn't continue using it. I will wipe it with alcohol before shipping. ▪️Product Description (Quoted from the official website) "goopo is a training sandal that creates good posture." * [High Type] is suitable for healthy people aged 13 and over. It is also suitable for those seeking higher effects. [Creates beautiful posture necessary for dance] ● It trains to create beautiful posture necessary for dance by standing the pelvis. ● 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. [Improve dance skills by strengthening lower body muscles] ● Naturally straightens the back and efficiently strengthens muscles by using muscles that are not usually used. ● Improves the force of stepping on the heel, leading to improvement in jumps and turns. ● By firmly gripping with your toes, the arch of the foot is strengthened. [Reduces foot fatigue] ● When you can maintain the correct posture and use your foot muscles in a balanced way, you will not put extra strain on your feet, reducing fatigue. 《How to use》 Wear it correctly and walk by 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 Thank you for viewing.