These KOS VivaK Boots is unusual for a sheepskin boot in that they have a lace up fastening down the front system with  leather laces and hiker boots style eyelets. The boots are made from genuine Australian Twin-Faced sheepskin,lining.Cushioned footbed is lined in genuine shearling with breathability and warmth to your feet. The molded blown rubber  outsole is very light, flexible and durable.