Used about 3 times. I used it for a 12kg medium-sized dog, so I think it can be used for medium-sized dogs! There are no stains, but I haven't used it for a while, so I would appreciate it if only those who understand this would purchase it. Since it's made of sweatshirt material, it's easy to carry on your shoulder even when not in use, and it blends well with casual clothes. The shoulder strap is adjustable. * I will remove it from the ring before shipping.