... you. 1.The material of the felt is from wool.The wool itself is one kind of the biodegradation,the non-toxicecology ... kinds of fittings,it won't occur static electricity.3.Super flexibility,anti-tearing,compressive resistance,seal,insulation,heat preservation,sound ... .4.Good wearability and crisscross is wool's characteristic,by overlapping makes the felt with wool own lamella after the fulling.USE ...