Specifications: Most of the felts are made of natural woolothers are mode of other kind of fur. It doesnt change the physical nature. Their main features are as the following: (1)Rich in elasticity,it can be used as material of quakeproof,seal liner and spring felt. (2)Because of good property, it is hard to loose and can be cut into parts of different shapes. (3)Having good wearability, it can be used as material of heat and thermal insulation. (4)Because it has close weave and small openingand its thickness is not limited as the interweave thingsit can be used as good material of filter. (5)Having good wearability,it can be used as material of polisling.