Omni-heat on an underquilt?

[AmericasHammock]

Excuse me if this has been discussed before but a search only brought up discussion about the clothes. I was wondering about the use of columbia's omni-heat material being used on the top side of an underquilt. Is it possible to buy the material? I have never worn any of the clothing that has it, but have heard it's quite warm and breathable. Would it add too much weight to even justify using it? I would think using it on a lighter 3-season quilt would help it go down to some lower temps. I know when I used a space blanket with my supershelter it made a huge difference. Any thoughts and comments are appreciated! I'm kinda new at all of this, it just sounded like a good idea to me.

[backpackingZombie]

I don't know if you can buy their fabric directly, I doubt it, but yes it would act similar to a space blanket, and probably stand up to torture a bit better.

[AaronAlso]

From what I've read about Omni-heat it's not unlike Insul-brite which can be purchased in any fabric store for about $8/yd @ 48" width. As with reflective heat barriers in construction I believe it is best to use as the outer most layer. This will reflect and keep heat stored in your bulk insulation longer.

A lighter weight alternative is Thermoflect medical blankets like those we got in a group buy. They are not breathable but there has been success with perforating them on the sewing machine. The same could be done with the reflective nylon sold @ DIYgearsupply.com.