Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Must be a bad pair

Bought these for my girlfreind who wears a womans size 8 in normal shoes. When she got them she had trouble getting them on and after wearing them only a few times the back ripped wide open. It was too late to return them, but I thought I would get her another pair (exactly the same) and she said they felt a little looser when puting them on. She has been wearing the second pair for a few months now with no issues.