-from Camco Automotive
Relectix is well-known trick for getting a little more warmth out of your sleeping pad setup. The construction grade reflectix can be a little bulky however.
A quick, simple, light and very compact alternative is the reflective sun shields that can be bought in any auto parts store or auto parts section of a larger store such as Target.
Simply place the sun shield under your sleeping bag and/or pad setup (some people like the visor on top of the pads others like the visor underneath the pads) and get some precious reflected heat back in your winter setup. I suggest using a truck/SUV one as that size is larger and is a better fit for full-length sleeping pads. ( I’d eschew Mylar emergency blankets as they are thin and will not hold up to regular winter backpacking use.)
No photo of the visor itself. Here’s a photo of a lovely campsite instead.
This article on the Hennesy Hammock page explains the concept in much more detail. (Scroll to the bottom)
So, if looking for a little more warmth for your winter camping, consider going to the auto parts store as well.
Not only for getting some essentials for winter safety while driving, but also for a quick camping trick, too. More durable than an emergency blanket if you winter backpack or camp on a regular basis, too.
Quick, simple, light, cheap: A sun shield. It works.
You may also be able to customize a size at your local hardware store, since they sell the raw material at mine!
Have you tested it yet? I’m planning on buying one for my camping next week.
I have used it on every winter backpacking trip I have done this season. As an aside, I only post “quick tips” I have used in the field. Have fun!