I am having trouble deciding between the Double Insulated Guide and the Outback. I did call Hoffman's and the person did tell me the Guide will be warmer, however the Outback has as the ankle lace strap, slightly smaller footprint, and weighs less. My main purpose for these are late season Idaho mountain hunts if the conditions are snow on the ground or persistent cold (-10F to 20F). In the late season, I would be hunting from a road camp or possibly backpacked in, lots of glassing and hiking. For comparison, for all other conditions I wear my uninsulated Lowa Caminos. I am just not sure if the Outbacks will be warm enough.