FANCY STRAPS WOOL SLIPPERS Anthracite wool felt upper and thick wool felt insole. Fancy cotton strap on the instep. The rubber outsole allows for outdoor use. Upper and interior in eco-produced wool felt in an R-W-S certified workshop. Color - ANTHRACITE Unisex slippers Available in sizes 34/35 to 46/47. R-W-S: Responsible Wool Standard