Glerups Unisex Model B Slipper Synthetic Leather sole 100% pure wool upper Trimmed, edged and fitted with soles of pure calf skin The boots may "shed" during the first days of use. The reason for this is that the coarsest fibres just need to be work their way out of the felt. It is only natural, and the fibres just need to be plucked off. GL-B-02-00, GL-B-01-00, GL-B-08-00, GL-B-05-00