it is used on Mic Phone,it can protect the sound more perfact,different kinds of Mic Phone Foam can be made into different colour and model, It can be made in different colour,size,shapes and PPI(10-60) It is environmental products, Non-Toxic strethy washable easy to dry soft touch It is widely used for Aquarium filter, air filter as cleaning product the basic material for active carbon filter foam. as accssories