The plastic film need to tear on the mattress?

after buying a new mattress, mattress surface has a layer of plastic film, this layer of plastic film used to tear the mattress? First of all, we need to know the role of this layer of plastic film, close to the plastic film is the surface of the mattress, its surface is mainly fabrics, this layer of the fabric is not to bear or endure dirty, and mattress often require long-distance transport, transport usually adopts the trucking, freight cars were generally dirty and, therefore, need on the fabric surface after a layer of plastic film, plastic film can prevent the mattress fabrics widely in transit, maintain the cleanliness of the mattress fabrics, so consumers after buy a new mattress, plastic film should immediately tear, prevent the plastic nondestructive furniture such as bed, also can make the mattress better air permeability.