I was excited to get these but was rather disappointed when they showed up.  As others say, they are simply a piece of metal with thin fabric wrapped around it.  They are very light, not too practical to store since they don't fold flat, and are not very warm at all.  I live in Texas and these were not warm enough for our winter so I can only imagine how useless they would be elsewhere.  You get what you pay for and these only would be appropriate for a dollar store.