These silicone socks will keep your nozzle clean and free from burnt and blackened plastic. They don’t just keep the nozzle clean but also help keep heat inside the hotend.
They also offer a huge boost in temperature stability, particularly if you use high airflow active cooling around the nozzle. The additional cooling combined with reduced heat from the block, the heater sock helps optimize the thermodynamics taking place just below the nozzle, boosting the ability to print great overhangs and bridges all while keeping the hotend temperature extremely stable.
Socks don't last forever though. Depending on what materials you print and how much abuse they get, they eventually wear near the nozzle tip. However, even with sticky abrasive materials and a bit of abuse, they should easily last 100+ print hours.
Material: Non-Stick Silicone