These are inexpensive, and are very thin, however for the price they are well worth it.  The color is more vibrant that pictured on the website and the packaging photo, which in my case was a bonus. The purple is pictured as more of a pink, they are in fact true purple.
   They are easily installed, however you will find that you need to put something down into the crevices along the back and by the arms.  I used very inexpensive foam pipe insulation from the plumbing section of your hardware store, at a cost of less than $5 total.  
  Very happy with this purchase. 

Pros: easy installation, vibrant color
Cons: thin fabric