12" tall boots keep legs and feet protected down to -400F/-400C Removable moisture wicking fleece liner pulls moisture vapor away from foot Removable liner also includes DuPont Thermolite® 200g full-foot insulation Full-length internal EVA filler in soles provides extra comfort and cushioning Anatomically curved buckles and pull tabs provide easy adjustment for a tight or loose fit Rigid bottom sole provides additional foot support and is slightly rockered for easy walking Grip tread sole provides exceptional traction on snowy surfaces Hook-and-loop tongue closure for easy on/off Replacement boot liners sold separately