Camp pad

From AmtWiki

Blue lightweight camping pad foam makes an excellent stabbing tip and pommel tip for any weapon. For those that like to construct flat-bladed weapons, blue camp pad will probably be one of the easiest things to work with.

A 20" x 72" roll of Ozark Trail of lightweight camping pad foam can be found for about $5-$6 in Walmart or any sporting goods store in your area that carries camping supplies.

Check out the Amtgard Resources and Foam pages for more information.