When I Google around, it seems that sites explaining what aluminum honeycomb is pretty consistently follow the pattern "Aluminum honeycomb is a [adjectives] mat

When I Google around, it seems that sites explaining what aluminum honeycomb is pretty consistently follow the pattern "Aluminum honeycomb is a [adjectives] material with [characteristics]." I get what you're saying about trussed steel, but I think that's really just getting at the point that categorical distinctions are rarely cut-and-dry.