... overlapping,needing,the felt formed,and by using punction function of needle to achieve thickness to enter the main thorn ... form a roll.CharacteristicThe material of the felt is from wool. The wool itself is one kind of the biodegradation, the non ... sound insulation,heatproofcotton-wadded shoes,shoe pad,inside lining of riding bootmattress,cold-resistant tent,vegetables big awningCertificationISO9001: ...