UGG cold-weather boots: UGG Adirondack Tweed cold-weather boots by UGG Australia: Waterproof full-grain leather with sheepskin lining, & a cuffable tweed shaft, the Adirondack Tweed extends the fashion-meets-performance of the Adirondack II, in an impishly shortened iteration. A breathable e Vent bootie, removable/replaceable sheepskin insole, & UGG-exclusive Vibram outsole stand up to snowy weather in unsurpassed style.