Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: is the material plastic or is it made of some other material
Document: I have been purchasing and replacing a competitor of this for years (which would always spring a leak after the plastic it was made from got old and cracked). This is such a better product in both construction and ease of use. First of all, it's not made of flimsy plastic, but a waterproof material that seems to be lasting MUCH better.
I love this mat. I have owned three Chillows but sooner or later they crack and leak water. This mat is covered with a cloth material and not plastic or vinyl. It is flexible, not heavy and is cooler than the Chillow.
I started with a Chillow, which was a complete waste of money. It made me even hotter due to the material. This mat is huge in comparison. It fits easily on top of the pillow in a standard size pillowcase. I started with it in the freezer-too cold. Then I tried just the fridge-still too cold. I was amazed.
It starts out being nice and cold, but after a while my hotness seems to heat it up and it's like I put it in the microwave. Probably just me being overly hot. It's also heavy and slips down on the pillow so that it is on the edge and not top of the pillow. Doesn't feel as comfortable as a pillow. Feels like you're laying on plastic that crinkles.
The item works as stated, providing a cool surface for your head. But note that the plastic exterior is hard and rough, not a soft squishy or cushioning surface, even when placed between your pillow and pillowcase. It might be better using it during the summer months, or would be great to use for an ice pack.
I have tried other products that also keep you cool at night. I like this one the best, it has an outer softer material, and gel inside. I put it in the freezer only for 1 1/2 hours to get it cold but not frozen. This way it is softer under my head.
My daughter always gets her head hot and sweaty when she sleeps. The material is soft and it actually works...keeping her head cool. She would wrap it around her legs and arms when she is not using for her head when she sleeps. She loves this mat! I wish there was a cover to be able to take off and wash.I would recommend this product.
Cooling pad came promptly and well packaged. This is a great item to have around the house and doesn't take up much space in the freezer when you choose to use it that way. Seams around edges are secure and material is quality. I anticipate this lasting a long time. Will serve many purposes so, money well spent!
I don't put the mat in the freezer, however have put it in a gallon sized plastic bag and put in the refrigerator for a couple of hours and its much colder for a longer time. The mat does shift a bit in the pillow case, but really not annoyingly so. All in all, I think the product works as well as I expected. I would recommend buying the pillow size rather than the larger size to try it out and to make it easier to adjust as needed.
Seems well made, but ultimately doesn't hold its cold that long. Works well to fit in your pillow.
Answer: It is a waterproof fabric, it is not the plastic kind beach mattresses and beach doughnuts are made of. The sad part is, no matter the material, it was not a cooling item as advertised. My poor daughter who goes through terrible night sweats due to menopause, did not benefit from them. In the morning, the "cooling" mat was drenched in sweat and so was my daughter.