• The Mountainsmith Modular Hauler 3 is not insulated. It's made of nylon, so it wouldn't keep the cold in by adding ice packs, and would likely start to sweat on the outside of the bag.
    Answered on 10/20/2011 12:00:00 AM by Anonymous from None
  • Not insulated.
    Answered on 4/26/2012 12:00:00 AM by R-Ten from Amhest, MA