16 responses

  1. pro2type
    September 5, 2008

    Using your sleepingbag could be a useful alternative.

  2. Hot Springs Guy
    September 9, 2008

    Nice! My cozy isn't as cool, I'm going to have to give yours a try.

    In regard to the other comment, I don't think putting food inside one's sleeping bag is a stellar idea… animals have great sniffers!

  3. Earlylite
    September 9, 2008

    I'd also be hesitant to use my down sleeping bag as freezer bag insulation Spilled/leaking water and down make poor sleeping companions when it's cold enough to need a freezer bag cozy.

  4. Dicentra
    September 15, 2008

    Very cool!!! If I didn't already have a couple of the fabric ones, this would be fun to do. Great info.

  5. sarbar
    September 15, 2008

    The ones made of Reflectix work well and are very easy to do.

    While one can use a hat, jacket, etc as a cozy (since a cozies function is to insulate food so it can cook) – I would suggest strongly that a person uses a dedicated cozy, be it Reflectix or a fabric one, such as we make. That way the cozy can go in your bear bag, Ursack or canister at night :-)


  6. Earlylite
    September 15, 2008

    Definitely – you wouldn't want your Freezer Bag cozy to be your sleeping bag in grizzly country. Very bag idea and it's hard to get it to fit in a bear cannister, too.

  7. George
    September 16, 2008

    Oops, I added my comment to the wrong post earlier.

    I just made a similar freezer bag cozy out of a reflective padded mailing envelope I bought at Target for $1.60. It's probably not as sturdy or as efficient as yours, but its cheaper than buying a roll of foil insulation.

  8. Earlylite
    September 16, 2008

    Nice! – you've reminded me that you can also use a plastic mailing envelope with bubble wrap insulation as cozy too. I did this a few years ago before investing in the huge roll of reflective insulation you see in the article.

  9. Laurag
    September 15, 2009

    You can get the insulating foil stuff in the auto section at Walmart for ~$5. They are the sun blockers for windshields. No big roll leftover after the project. It is more like foil bubble wrap, but it works great!

  10. RevLee
    May 26, 2011

    A couple of the self adhesive velcro dots work great for keeping the flap closed.

  11. David
    May 26, 2011

    Since I already have everything here, I think I'll make one of these. I used my knit hat as a cozy but ended up as a Mac 'N Cheesehead–I guess it's good I rooted for the Pack in the Super Bowl. I don't think I'll try the sleeping bag. The first time my grandson backpacked with me at age four, he spilled a bottle of chocolate milk into his brand new Marmot down bag. I don't want to go through that kind of clean up again.

  12. Megan
    April 23, 2012

    Nice. Really enjoyed your talk at the REI on the 4000′ ers.. Gearing up my backpacking season with my first DIY freezer bag cozy thanks to this post.

    • Earlylite
      April 24, 2012

      Awesome – glad you came!

  13. Shane
    June 21, 2012

    You can reduce the number of seams and amount of tape by using a single long rectangle, just fold it into an envelope shape and tape the sides. It’s probably a bit more insulating as well.

  14. Chad
    June 21, 2012

    Our senior Scouts just headed to Arkansas this week for about 40 mile backpack and used these cozys along with my kelly kettle to make sure they ate well. Our favorite – couscous tacos.

  15. VTMike
    May 13, 2014

    Just built this for 2014 – used duct tape instead of reflective tape and added a couple of velcro tabs to keep it all in place. Thanks for the idea.

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