I recommend that either the book is rewritten or withdrawn. We usually would pack it inside my hand carry luggage or just hook it on my purse or my sons tiny backpack. I should have heeded other reviewers? warnings. Down the road I?ll probably need to replace the wood. After the initial break in of the shoe I can wear them with out the guard. I hope that Amazon will make this right as I am a very good customer. As it stops charging randomly due to what I think is a lose connection. This was not made clear. true to size, plenty of width (this may pose a problem for people wide narrow or medium width feet), offers support and yet is soft enough to be comfortable. It seems to be mostly spot welded together.