Compatibility: The memory foam eartips compatible with Decibullz Custom Molded earplugs, earphones, earbuds and More Material: Memory Foam, comfortable and soft, no ear pain for long time. Securely Fit: Engineered to be the perfect shape for optimal in-ear fit, these tips stay securely in your ear, and no easy to fall off. Slowly Rebound Sponge: The foam tips will be deformed and ugly after pressing, about 60S to fully recover. Better noise cancellation after full rebound.Effective hearing protection. Package Contents: You will get 3 pairs foam eartips. The Memory Foam replacement tips for in-ear earphones with 4.5-5.5mm, slowly rebound, comfort fit, no ear pain for long time.