If you are referring to the rubber material the Toa Inika's masks are composed of, I am eager to learn what kind of synthetic rubber can be used to create something so unspeakably alien and terrifying that it would induce instant insanity on anyone who gazed upon it, or just what diseased fancy would be capable of even conceiving such a thing.
I can imagine the commercial now...
Narrator: (Repulsively enthusiastic and excited) "New from BIONICLE!!!! A ragtag team of villains assembled to find an ancient being of unimaginable power encounter something beyond imagination!"
Little Bobby: (Awed or incredulous) "But mista, how can an amorphous, gelatinous mass of spines and tentacles be properly represented with Legos?"
Narrator: (Quietly yet sharply) "Shut up kid, it's called artistic license!" (Swiftly switches back to regular, overly enthused tone) "The cosmic horror or renowned author H.P. Lovecraft comes to terrible and vivid life in the world of BIONICLE with Tren Krom!!! Watch as your favourite BIONICLE characters return to encounter something so terrible, it will force them all to deeply ponder their own insignificance within the perpetual void of a callous universe!!!"
Little Bobby: "Wow mista, that sounds like fun!!!"
Narrator: (Intense, unsettling and sinister) "Oh, believe me Little Bobby...it will be...so much so, in fact...that you just might lose your mind!!!!!! WAHAHAHAHAHA!!!!!!
(Scarlet, hooked tentacles appear on screen and drag Little Bobby away kicking and screaming)
(Little Bobby lets out a crazed, blood curdling shriek of absolute insanity and terror. It is so powerful that we cannot put it here)
Narrator: "Each set sold seperately."