Instructions: In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.
Input: The case actually begin to expand over time and was no longer form fitting to my phone, especially when in warm situations (holding the phone in my hand actually made it warm enough for the back of the case to begin to "wave" and to cause the case to lose its form fit.)
Output:
Case stretches over time - especially in warm temperatures