Rollmat question!?

[Tiburonsmoke]

Moonbags? I still have two. Bought them for £20 each in 1987. They contain Millium - silvery foil thread, I believe, although I've never seen it - to reflect the heat. Not very insulating, but fine if you keep loads of chocolate next to your sleeping bag. I still use mine. They do pack small. The polyester outers are starting to tear and disintegrate to reveal hollowfibre insulation, but if I'm careful I might get another few years...

I'm a bit late to the party, but I'd say silver side up. You want the barrier to reflect the heat back as close to the body as possible.

I'd say silver side up to reflect body heat, rather that silver side down. Things get colder due to loss of heat rather than absorbing cold.

Probably something to do with the second law of thermodynamics.

Anyone remember Moon Bags? A thin sleeping bag with a layer of aluminium foil sewn in. They were rubbish but packed small.

Stu

 

[brambles]

silver side up to reflect heat to you .dont think yuo can reflect cold

Heat and cold are in essence the same thing, ie , temperature, and both radiate but in using a foil to deflect radiation you have to also avoid conduction through contact which is why an insulation layer is also required.

 

[raskusdrotti]

Brambles, this thread is from 2007! I was just going to vote and it told me I had already...

 

[brambles]

Brambles, this thread is from 2007! I was just going to vote and it told me I had already...

I did'nt notice that until you posted! That's weird because it popped up in "New Posts" , I guess someone voted and that brought it forward?

 

[raskusdrotti]

I think that it must have been, odd stuff...

 

[Ahjno]

Closed poll.