The fabric I used for my heatpack is cotton(both the sleeve and heatpack). You dont want to use anything that could melt or spark in your microwave while heating it.
Here is a picture of the heatpack outside of the sleeve. I basically measured out how big I wanted my heatpack, then I measured an inch larger(1/2 inch on all sides) for the sleeve.
Heatpack dimensions: 17" x 6 and 1/2" (unfinished with seam allowances included).
16" x 6" (finished)
Sleeve dimensions: 19" x 7 and 1/2" (unfinshed with seam allowances included).
18" x 7" (finished)
The Sleeve (as you can probably tell) has one end that I turned under so that it would not fray. (The prospect of random threads from the material didnt sound too good haha).
This is a grid of how I did my heatpack. All the black lines are where I sewed between the rice(filler) so that it was lightweight and the rice didnt move all around. The dark red is where I folded the material under and finished it off.
I used Brown Rice as the filler and it works really well, there are many other fillers out there you can use, but i like the smell of rice and it holds the heat really well. If you choose to use rice as your filler in a heatpack DO NOT use white or minute rice as it will possibly start a fire in your microwave....not fun times lol
For more info on heatpacks (where i got all my info haha) please go to: Rice Heat Pack
If you have any questions for me on this post, just let me know and I will try to answer it!
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