[Maybe this person comes from a planet where these materials don’t exist. Yelena supposes not all worlds will have the same materials and resources.]

Good carbon fiber can be better than steel. Strong, but light weight, and it won’t set off metal detectors. G-10 is a kind of fiberglass. On Earth it is usually used in the grips of knives and guns, but it can be sharpened to a blade, too.