The Sleeve is made of wool felt but from a sythetischem felt. From the feel of her that are natural worlds. If I can handle it before, I would have certainly not bought. Own fault, for the price you can not expect too meigentlich wool felt. Otherwise, the thing looks natural not look bad, and that I have no inside space for power supply and mouse because I could have know. Promised not too much, but also excited nich: Therefore.