Very good material, Super toughness Earbud Earpad Ear Bud Pad Replacement Sponge Covers for Earphone Headsets are used to enhance your music listening experience by giving you a comfortable feel. You may also use these to provide better hygiene by changing your ear pads regularly. Also compatible with many Bluetooth Headsets
Specifications :
Compatible with most earphones for MP3, MP4, CD, DVD, Phone, etc, EXCEPT IN EAR style Elastic, comfortable and durable Noise isolation Material: soft sponge foam Diameter: approx. 18mm