When creating the casing or topstitching, make sure the inner curve seam is slightly inside of the hood to stop it from peaking out in the future.
Alternatively if not using a drawstring you can Understitch the inner curve seam.
Step 5: Making a neckband (Optional)
A neckband can be useful to stablise and cover the neck seams but it is optional if you wish to skip it.
Cut a cross-wise strip of fabric out of your main fabric:
Your neck opening + double your front seam allowance long
Triple your neck seam allowance wide.
Step 6: Attaching the hood
Pin the hood to the neck with outer hood matching good side of neck.
If using, pin the neckband good side to inner hood matching raw edges.
Sew the neckband seam.
Finish seam if not using neckband then proceed to Step 7.
Press neckband down.
On outside Topstitch neckband in place.
On inside, trim neckband down to topstitching.
Step 7: Attaching the waistband
Fold the waistband in half lengthwise matching wrong sides. Press.
With good sides together sew the waistband to the bottom of the back and front.
Fold the top of the zipper tape down to the good side of the zipper tape. Trim if need be.
Pin the zipper along one of the front edges of the hood, front and waistband. Making sure the zipper pull is faced the good sides of the hoodie and the bottoms are lined up. The zipper teeth should just be slightly over the seam line with the edge of the tape either matching or being slightly over from the hoodie edge.
Using a zipper foot stitch the zipper to the hoodie using you seam allownace width. When you reach the zipper pull, stop, put your needle down, lift the presser foot, pull the zipper pull past the presser foot, lower the presser foot. Then you can continue sewing the seam.
Unzip the zipper.
Pin and sew the unattached zipper tape to the other side of the hoodie the same way.
Press the seams to the inside being careful not to melt the zipper teeth with your iron.
Topstitch the zipper tapes in place. You may need to use a zipper foot.
To help match the pockets and seams, when it is attached to one side and temporarily mark the corresponding teeth at the pockets and seam. You can now use these marks to align the zipper to the pocket and seams on the other side.
You only need to face your fabric if it is very stretchy or needs a bit more stability.
Step 10: Thread the drawstring
Thread the drawing string through the drawstring holes.
If needed secure the ends of the drawstring e.g. with something like aglets.
Use a safety pin to help thread the drawstring.
Step 11: Enjoy!
That's it! Your all done! Now go feel warm and comfy in your new hoodie!