Baffin Women's Snobird Snow Boot 100% Leather Rubber sole Waterproof base and treated suede upper Rated to -40 for those ultra cold days but not uncomfortable in warmer conditions Removable, unique multi-layer foam inner boot system adds superior warmth, slim design, and is much lighter weight than more traditional felt designs. Long lasting premium rubber outsole compound offers slip resistance and durability Flexible midsole and internal arch support system for all day comfort