• The liner is removable, but there is not a temperature rating for these shoes. There are various factors that can change that rating.
    Answered on 9/29/2010 12:00:00 AM by Customer Care from Sierra Trading Post
  • I believe the boot is rated for -40 degrees and even though it does not get that cold here in Michigan my feet were warm all day at 20 degrees. The liner is removeable and I believe you can purchase liners seperate to replace if needed.
    Answered on 1/4/2011 12:00:00 AM by TODD THE RIPPER from Muskegon, MI
  • Not sure the rating but liner is thin. Liner is removable.
    Answered on 1/12/2012 12:00:00 AM by DJ from Las Vegas, NV