Given the task definition and input, reply with output. In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.

I now realize why these sheets were on sale. The material does not hold up to normal use. After using these sheets for just a short time I find that little pills (little tiny balls as on sweaters) form and are uncomfortable to sleep on. I would not recommend these sheets.
Material forms little annoying pills as it deteriorates