I wasn't sure I needed this but the salesman at Cabelas just nodded and emphatically said, you really should think about getting one.....and nodded. He was exactly right. What I like about the closed cell foam is that I can put the tools away and throw the "tool caddy" into the travel bag and take it with me. That would be more difficult with a wooden organizer. The foam is light and helps to "pad" the travel bag and keep my vice safe during travel.