In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.

Let me give you an example: My cat won't touch these. My dog, however, chews them and makes a mess all over the carpet and I can't get the shredded sticks out! Messy. Waste of money!
The answer to this example can be: Cat hates them
Here is why: It's a correct summary because the owner's cat hated the product.

OK. solve this:
We've used this for about a year now. It's definitely not waterproof, is water resistant depending on how much liquid hits it at one time, and easy to wash... but the no slip grip on the back flakes into tons of crumbs that are all over the couch, floor under it, etc and they are never ending. The dog ate a hole in it and it's ripped from nonstop use and I think it served us well - but I won't purchase again because of the crumbly/flakey back.
Answer:
The non slip part flakes and crumbles and makes a mess