The bag packed away great. Could really take as much as air out of it as you can press it. The only complaint I had about it is the compression. I used my own dry sack instead. The back was extremely comfortable. I got the large version just for the extra room to put clothes down there and such to keep warm. The top also forms very well around your head. I thrash around a lot at night in my sleep and the bag had plenty of room for me. Enjoy!