The creator describes two interesting mechanical properties his parts exhibit:
> synclastic bending and auxetic behavior. Synclastic materials have the fascinating ability to assume compound curvature along two (often orthogonal) directions. One can wrap a sphere easily in a synclastic material without folding it whereas attempting the same with an anticlastic material, such as paper, would require numerous folds. Auxetic behavior is found in materials with a negative Poission's ratio, which relates the deformation in one direction when the material is stressed in a perpendicular direction. When compressed in one direction, auxetic materials contract in the other, and when stretched, they expand. In other words, an auxetic nail would become narrowed as it was hammered into a board and expand in diameter when pulled out of the board.