Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Terrible product - don't buy!

They didn't last three days, walking less than an hour each time. The bottom "Sturdy, protective polyvinyl nonskid soles" are plastic and breakdown when the temps are freezing or below. Without walking on any pavement/concrete, our Lab tore through the first boot on day one, another on day two, and shredded a third boot within five minutes of playing fetch on snow.