Smith's Grove H20 Pics (Smith's Grove Sanitarium) Smith's Grove H20 is an H2O replica made by Smith's Grove Sanitarium. The mask was cast from the screen used "Hero" mask. The mask original sold with synthetic hair, but is now only available medium brown crepe hair. Neck extension is optional. The mask is quite small and will fit a head size up to 22 ½” with little room to spare.