Bootstrapping is an American idiom. There is a handle on the back of the boots that makes it easy to put on the boot. Bootstrapping means that the person grabs the handle on the back of the boot and pulls himself up. Normally a fulcrum is required in leverage systems. But the handle on the back of these boots has no fulcrum. It is physically impossible. But despite that, you can wear your own boot, even if there is no handle. You do the impossible. This is the bootstrapping philosophy. Doing what seems impossible on your own.