The Montana is part of the Naot Outdoor Collection.  This waterproof upper calf snowboot is perfect for even the coldest winter days with a 4 layer weather tech lining that is rated -20C/-4F.  The slip resistant rubber sole features an innovative on/off OC Grip System with stainless steel studs allowing you to walk comfortably on icy surfaces.  The Montana features Naot's removable anatomic cork & latex footbed and a side zipper for accessibility.