Gecko feet contain microscopic 'hairs' that helps them stick to a surface, especially things like glass. This inspired take mimics the way their feet works to adhere better.
These burrs were used to inspire the idea of Velcro. Velcro uses the idea of how these stick to things, sizes it down, and then it is much stronger and easier to use.
The way cells are structured allowed a new form of metamaterial that is now much stronger and straightforward