I haven’t actually been asked yet! :) Thanks for asking though and I’m happy to share~

So I first started with this wig: Arda’s Merry in Pumpkin:

and bought this cheap 20 dollar wig from ebay:

I essentially used the second wig to harvest wefts for the higher quality Arda wig. So pretty much a few hours after I received the second wig in the mail it was a bunch of loose wefts on the table that pretty much looked like this:

If you turn a wig inside out you’ll notice that the wig is made up of layers  of all these lines of string/fabric holding the wig together. These individually are called wefts! What you’ll essentially be doing is sewing new wefts directly attached to those of the base wig. I did this by hand stitching but people also do this by hot glueing too. 

And imagine the pile being about 4x its current size for what the wig originally gave me. Those still here are the wefts I still need to sew into the wig~ 

If you look closer each of these bits are held together by black string/fabric essentially. It’ll be these that you sew into the wig attaching to your base wigs wefts too!

So you take your pieces (I did both single wefts I cut out and huge chunks of wefts I cut out from the sacrificial wig to keep the integrity of some of the pretty curls) and you stitch them right against the weft you’re putting it on top of. I primarily used the overcast stitch so that it went around both hard/string parts of the weft keeping them together, and you want to make sure when you’re stitching to go through both ‘string’ parts so that you’re not just sewing the wig fibers c:

This may have not been done entirely properly but I like how it ended up looking for me. So this is an example of a big piece a cut out off the sacrificial wig to keep the curls and I sewed it into the wig from just the top weft. But if you’re doing this be sure the other pieces are still attached to the weft you’re sewing in. 

This is another example of what I did -> I took another big chunk, sewing the ends of the chunk together with a zigzag stitch, then hand stitching that into the top of the wig~

Essentially all you’re trying to do is place the new weft that you’ve made by cutting up your old wig, and placing it right on top of the weft on your base wig you want it to go on and sewing them together! :D

Ultimately when you have the wig upright again you’ll end up with this where you have both parts of the wig showing through :) And you should eventually end up with something like….

This! woo~ :)

I also haven’t put extra wefts down on every line of the original base wig either - currently just sort of at the top, in the middle and on the bottom as well but I’ll be adding more around too of both this sacrificial wig and likely two others I’ll get for highlights and lowlights :) 

I hope that answered your question and helped a bit~ I’m sorry this post is a bit of a dash eater XD But I wish you all the luck on your own and please let me know if I can help again!! :D Thank you so much for asking this I had fun putting this togther :)