Instruct: Classify a given Amazon review as either positive or negative.
Query: Works for it's purpose but is coming unraveled

I've only had this item slightly more than a month and wear them every night. I do feel they help with the plantar fascitis pain. However, the stitching at the top of the sock near to where the velcro pull is located is coming apart. That's concerning to me since I haven't had them very long. Based on the cost, I would have expected them to last much longer than this.