40-yr-old 3-sided zipper design finally put together to function

CSAIL scientists worked on a 40-year-old three-sided zipper design and finally put it together to help "tune stiffness" of objects. It's like a switch that seamlessly flips chairs, tents, and purses between soft and rigid states, making their assembly easier, they said. They have built a software which helps customise these three-sided zippers and then 3-D prints them.