Mylar to Temporarily Bump Temperature

[kendra.b]

Has anyone had any luck with using a Mylar sheet with a pad or underquilt for when the temperature drops lower than expected?

Edit: Also, I imagine I would put it on top of my pad but still between the double layers of my hammock?

[SilvrSurfr]

Expect condensation.

[BillyBob58]

Has anyone had any luck with using a Mylar sheet with a pad or underquilt for when the temperature drops lower than expected?


Sent from my iPhone using Tapatalk

I have used them for a decade in my HH Super Shelters(as recommended by HH). I also have put them inside my Speer Pea Pods for when the temps were below the rated 20F, or even higher to help keep the down dry on longer trips. By hanging hem beneath my hammock but above the insulation, which helps keep them warm, I mostly get zero condensation, but occasionally get a few drops at the low point. YMMV. The key is to keep this vapor barrier warm. As condensation happens when warm vapor contacts a cold surface(like your windshield for instance). I'd say mine adds 10-20º F to my HHSS, plus does a great job of keeping any condensation out of my insulation. Whatever you do, do not put it on the outside of your UQ, unless it is separated by some distance from your quilt, or your quilt will get wet from condensation. Don't do that UNLESS you also have another vapor barrier(space blanket, VB clothes or liner) on top of your under insulation, to block your body vapor from contacting that cold outer layer, where it will condense. If you only use one space blanket/VB, make sure it is between the hammock and all other insulation to keep it warm, unless you want condensation.

[kendra.b]

I have used them for a decade in my HH Super Shelters(as recommended by HH). I also have put them inside my Speer Pea Pods for when the temps were below the rated 20F, or even higher to help keep the down dry on longer trips. By hanging hem beneath my hammock but above the insulation, which helps keep them warm, I mostly get zero condensation, but occasionally get a few drops at the low point. YMMV. The key is to keep this vapor barrier warm. As condensation happens when warm vapor contacts a cold surface(like your windshield for instance). I'd say mine adds 10-20º F to my HHSS, plus does a great job of keeping any condensation out of my insulation. Whatever you do, do not put it on the outside of your UQ, unless it is separated by some distance from your quilt, or your quilt will get wet from condensation. Don't do that UNLESS you also have another vapor barrier(space blanket, VB clothes or liner) on top of your under insulation, to block your body vapor from contacting that cold outer layer, where it will condense. If you only use one space blanket/VB, make sure it is between the hammock and all other insulation to keep it warm, unless you want condensation.

Great suggestions, thank you!


Sent from my iPhone using Tapatalk

[dakotaross]

Lot of hangers I know use a piece of reflectix pad in between layers. They almost always get condensation, though, but doesn't seem to get the quilt wet.