Used for three months starting September 2025. Used 3 to 4 days a week. I stopped using it because my knee improved through rehabilitation. Regarding stains and scratches, I've marked it as "slightly scratched or stained" because of some noticeable pilling. There are no tears or damage. It's in clean condition. For those who understand that this is a used item. Hard type ZAMST ZAMST ZK-PROTECT LL size