Instruct: Classify the given review into positive or negative sentiment.
Query: Best when used below freezing

When I first got this disc I was eager to try it out. It is much lighter than the JAWZ disc but it is definitely intended to only be used when the temperature is below freezing. I used it once with temps. in the low 40's and my 42lb Border Collie put puncture marks in it and made the edges jagged. It is light and flies nice though. So when the temp. dropped I brought the disc back out and now there are no new marks! The company is right, it does stiffen in cold weather but is too soft at warmer temps to be used by the average dog.