Heat shrink tubing, rarely referred to simply as “HST” even in our acronym-intensive world, is made of cross-linked polymers ...

The only downside here is that the biggest tube that came with your average heat shrink multi-pack is probably ... on generously stripping stranded wire and wrapping the long strands around ...

Honestly, when the documentation for soldering some USB connectors onto a wire looks this good ... a coil the cable with a wooden jig and a heat gun is definitely something to file away for ...