Product review (2 stars): Not what I was expecting.
Make sure you read the description.  I stupidly thought these allowed you to touch the rack edges without an oven mit.  You will still burn yourself if you touch these.  I thought they were cheaply made, they give off a yucky odor the first time they are used, and seemed to just get in the way.  In my opinion they were pointless and we quickly returned them.  Also, if you are ordering, note that it is a pack of 2.  I thought the price was for 1 and ended up getting 4 instead of 2.  I guess it's a neat idea??  But I just don't ever burn myself on the edges of the rack.  I also got the plastic ones that are offered on Amazon and quickly returned those as they were too thin.