Shrink tube: are there different types? | All About Circuits
LPT: Increase the life of your headphones by attaching heat-shrink tubing to the end. Reduces the chance of disconnecting the wires on the inside. : r/LifeProTips
Genuine way to protect earphones - heatshrink tube : r/lifehacks
Easy Ways to Use Heat Shrink Tubing: 11 Steps (with Pictures)