How to prevent your headphones breaking using a spring from a pen and heat-shrink tubing.
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
1m Heat Shrink Tubing Tube Sleeve White Black Red For Iphone Ipad Android Headphone Cable - Cable Sleeves - AliExpress