100% Textile and Synthetic Made in USA or Imported Rubber sole Shaft measures approximately 10" from arch Winter boot featuring synthetic rubber shell and waterproof 600 denier nylon upper with adjustable strap at ankle Bungee toggle at opening Removable moisture-wicking footliner Temperature rated as minus 40 degree fahrenheit 8 mm Zylex removable liner (97% recycled content) with moisture wicking lining