Folded Elements (IMAGE) AKSON Russian Science Communication Association Caption a) Folded elements of auxetic materials straighten out, increasing its transverse dimension under stretching. b) Products made of any materials, folded according to the rules of the miura-ori: a folding system, which makes it possible to straighten the construction in one movement, also possess auxetic properties. c) Sneakers sole made up of overlapping triangles behaves like an auxetic under pressure. Credit Article authors Usage Restrictions Must credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.