Review (5/5): Great product, but FYI this is not a pack of 4, but rather a pack of 1!
Product is great and I have bought it multiple times. Heavy-duty. Elastic lasts for a long time. I've even run it through the washing machine and dryer a few times. Will get a little moldy after using it for a long time.
There is only 1 in this package, not 4 as advertised.