Lamberson offers his high end mouthpieces in a "pure plastic" (his words) called acetal (as well as in hard rubber and wood). You can read about the material here.
His site says: "I do the actual machining, starting from a "log" of cast acrylic, which I shape using a manual lathe and milling machine..."Martinman said:I am pretty sure that the saxscapes are made from acetal. I think I read it on the site, but I am not sure.