| abstract |
The invention relates to an insulating material which comprises a first layer of an essentially non-hygroscopic fiber material and a second layer of an essentially hygroscopic fiber material, said first layer being located adjacent said first zone and said second layer being located adjacent said second zone. The insulating material is characterized in that said first and said second layer are made of a highloft nonwoven material with a density of from 5 to 125 kg/m 3 . |