Är alla Reeds kostymer elastiska?

Jag kommer inte ihåg att detta nämns specifikt i den här filmen, men i serierna Reed skapar kläder från

Ostabila molekyler

A synthetic material created/discovered by the famous scientist Reed Richards, which can be altered easily and adapt to a certain environment, allowing them to be incredibly resilient to drastic changes in heat, cold, pressure, density, dirt, etc. making them ideal for use as superhero costumes.

Unstable Molecules are configuration of unknown atomic nuclei and electrons discovered or synthesized by Reed Richards, which is responsive to certain energized matter around it. Used in the making of clothing for the Fantastic Four and certain other superhuman beings, unstable molecular cloth mimics its wearer's physical properties, it can turns invisible like The Invisible Woman, allowing it to stretch like Mister Fantastic and burst into flame without burning like the Human Torch.

Wikia

Som det händer är detta som nämns i den första Fantastic Four filmskript ...

                              REED (CONT'D)
                     Material made from self-regulating
                     unstable molecules.  I've been working
                     on a formula for this.