Changes

=Making a Jimbo Bandana=

The Jimbo bandana is made by folding an ordinary bandana into a triangle shape and selling along the edge nearly all the way. You need to leave a gap that is large enough to get the ice into; too small and you'll have trouble filling it with ice quickly, but too large and the ice will tend to fall out. An improvement on the current design might be to use zipper along one edge, but I've not tried this.

=How much ice?=

Obviously putting more ice into the bandana will keep you cooler for longer, but more is not always better. Putting too much ice into the bandana makes it heavy, and the bandana will press on your throat which can be quite uncomfortable. Getting the right balance of ice requires a little trial and error.