I suppose it's not meant for the sun and snow here in Colorado.  We haven't even owned it one full season and it's torn already.  I thought that wouldn't be the case when I took them out of the packaging as they were heavy and felt really durable; but after having them on our lawn furniture for a few short months, I noticed yesterday that it was already torn and allowing snow to pile onto our patio furniture.  Bummer, we'll have look for a different alternative.