1、Super High Grade Memory Foam: Made of high quality, soft and comfortable memory foam, this memory foam earplug can prevent earache caused by silicone earplugs. Wearing it for a long time will not hurt, and it fits the shape of your ear comfortably. 2、High Quality Material: Replacement earplugs made of slow rebound memory sponge material can provide more noise isolation, ear stability and lasting comfort, durable, flexible, replaceable and detachable. Prompt to provide more comfort. 3、Improve Sound Quality: This memory foam earplug not only provides good sealing to reduce some external noise, but also can improve the bass response and improve the sound quality through the built‑in noise reduction net. 4、Perfect Size Design: The memory foam eartips are easy to install and fit for IOS earbuds perfectly. There is no need to compress or stuff foam into the charging case. Replace any damaged, scratched, defective or missing eartips. 5、Comfortable: The soft and super soft memory foam can change with the ear canal, perfectly fit any type of ear canal, and is very suitable for fixing the earphone to prevent it from falling during exercise.