If you are new to invisible zipper yardage, we will put the pulls on the tape for you, up to 25 pulls. When using the tape, slide pulls GENTLY down the tape before cutting off.
If you look at the invisible zipper tape, you will see a little fold in the coil where the zipper actually folds to the back. I use a standard invisible zipper foot & stitch in the ditch. Just remember that you need to leave sufficient tape so that the fold will occur. Otherwise the zipper will pop. Then you have to take it out & start over.
I have found, after thousands of pillows & duvets, that my invisible zippers show just a bit & when putting the over-stuffed insert into the pillow cover, I put my forearm down along the zipper to take the pressure off the invisible zipper then gently close the zipper.