The tallest of Bugaboot Plus line, this super-warm boot features 600g insulation, thermal-reflective liners and is rated at -65F/-54C. And yes, they're totally waterproof. Your feet will never know what miserably wet and bitter-cold days are all about. Combination of leather, nylon, webbing and metal hardware. Techlite shell. Waterproof seam-sealed consturction. Omni-Heat reflective lining, 600g insulation. Rated -65F/-54C. Techlite lightweight midsole for long lasting comfort, superior cushioning, and high energy return. Omni-Grip non-marking traction rubber outsole. Material: Leather.