Ecostyler. I rarely wear my hair down in a WNG if it is not summer. When I do, I use a combination of Eco Styler and this curl activator I get from Walgreens. Its called Long Aid
I've tried many many products, and my most recent purchase is Curls in a Bottle by Curl Junkie, but it hasn't been warm enough yet for me to try it.
I do a lot of buns and twist outs because its hard to get my hair to keep the look it has when wet. Plus I have mad shrinkage in the back, but not in the front.
Another thing that works for me is applying a gel or moisturizing product (in winter) to my hair and leaving it in large twists for about 10-15 minutes, then untwisting before it dries. Only separate the twists one time and let it air dry. You won't have your exact curl pattern, but a stretched out version of it.
I used to do weaves and wigs, but I'm pregnant and can't stand to have anything in my head.
Good luck, let me know if it works for you!