What's the best way to sew elastic into wool?

I adopted the pocket method of leaving a flap of fabric where the elastic will go and folding it over. Basically, I used the pattern for my fitted diapers and cut the wool from this (since I will have no seam allowance, it makes it a bit bigger than the diaper). At the legs and back where I wanted elastic, I just cut out and around those areas leaving a 3/4" or so flap. Then, I sewed my elastic down as usual, and then covered it with the flap and sewed the flap down, being careful not to catch any of the elastic.

Oh, I almost forgot. My machine has an overedge stitch and so that is what I did all around the edges, since this was a 1-layer cover. I used 100% polyester thread so it wouldn't wick.

I'm quite proud of myself for this wrap Here are a couple pics:

http://www.jheredia.com/photogallery/woolwrap1.jpg

http://www.jheredia.com/photogallery/woolwrap2.jpg

I just made a wool wrap with FOE and it was really easy!

The steps I followed:
1. Felted old sweater very slightly.
2. Cut pattern of one layer (followed my diaper pattern but added a 1/2 in all around)
3. Sewed FOE all around
4. added aplix closures.

Some things I learned:
The FOE was great (quick & easy!), though on the next one I make I will only pull the FOE tight around the back and around the legs. I pulled all around and so while the wrap fits great and is not too tight, the edges around DS's belly roll in and the edges where I attached the hook aplix roll in a bit. Also, I would attach the aplix b/f sewing the FOE.

HTH! Let us know how your cover turns out!