The North Face Isabel is an aggressive and ultra-warm boot in a graceful and classic disguise. This boot can be worn anywhere from indoors to outside in the blustery winter weather. The upper is waterproof nubuck and leather with an easy on and off zipper closure and curly shearling collar lining. There is PrimaLoft insulation and a HydroSeal waterproof membrane on the inside, along with an AgIONŽ anti-microbial footbed covering and EVA midsole. The outsole is durable TNF WinterGrip rubber for superior traction.