I was delighted to find these covers at such a reasonable price. The neutral color went well enough with my existing covers, which I have had for a few years. I have only been using these about 2 months since we have had so little rain in California this year (I ordered them last Spring, when I bought the chairs, but they have been stored in their original packaging until recently). The exterior is mildewing significantly, which looks unattractive and unclean. I inquired about exchanging them (with the thought that Scotchguarding the outside might help), but Overstock said no, since it is past 30 days. I am very disappointed! I would have to spend another $XX to experiment. Sometimes you get what you pay for. In this case it wasn't such a deal after all.
This cover is well made, fabric is heavy duty with air vents and has a good elastic bottom to hold the cover on the chair securely. The covers performed as expected during their first rain storm, with high winds and lots of rain to give them the test. I highly recommend this product.