I bought 4 of the exped pillows, and all work great. I tried them in cold weather and even in my own bed at home. They hold their air very well. I really like the red fabric that they are made of...very comfortable. I don't even use a cover over the pillows. I also bought the exped downmats...and just like the downmats, the trim and finish on these products is outstanding. They all come with patch kits, they look cool, the compress very small, have nice storage bags, etc.