I don't think that most fabrics will burn in a microwave (as opposed to a regular oven) because it's only the moisture in things that heats up in a microwave.
If whatever you put in your bags though has enough moisture to heat up really hot, some plastics (polyesters, etc.) could be affected because of conduction from the fillers, but generally not ...however, the older the bags get, the longer their fillers often need to be microwaved, so longer times could be a problem for synthetic fabrics eventually?
(Other natural fabrics besides cotton would be silk, wool, rayon I think, and possibly others.)
Here are some other things that heating bags (which can also be cooled in the freezer btw) can be filled with, though some behave differently --e.g., hold heat longer, are moister, last longer, are less resistant to bugs (corn), have scent, etc.:
grains like:
rice...flax seed ...millet...barley... corn... buckwheat
also:
cherry pits ...small aquarium gravel... sand
Some scented additives if you want to use them could be dried herbs, potpourri, dried orange or lemon peels?, essential oils, etc.
And check here too for a comparison of some of the different kinds of filler:
http://www.diamondthreadworks.com/microwave_heating_bags.htm
HTH,
Diane B.
2006-12-15 05:04:25
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answer #1
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answered by Diane B. 7
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I have Henry Warm heart, a microwaveable bear hottie. So teddy bear fur doesn't burn.
2006-12-15 02:12:05
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answer #2
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answered by cooperman 5
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