The small 3-pack of Bulletz True Wireless Memory Foam Isolation Earphone Tips from Dekoni Audio are slow rebound memory foam eartips for various true wireless headphones. They fit a wide range of true wireless models like Sennheiser Momentum, Fostex TM2, and many more. Built with a 4.9mm thread, the non-silicone eartips can be safely cleaned with soap and cold water and are designed to fit with the earphones inside their charging case.