This is an overseas product, so the sewing may not be perfect, but I believe it can be used without any problems. I am selling it because my child has outgrown it. ● The waist is roomy for 80cm, and it kept slipping down, so I have sewn it. I will sell it as is. ● The shoulder straps are the type that you tie yourself, so they are adjustable. If you would like, I can also include a rash guard (100cm), so please comment. It's also fine to let me know in a message after purchase. ※ The price remains the same regardless of whether or not you want the rash guard.