This is a first for me. putting a invisible zipper into any thing thick. Long years ago I put them in the back of my dress's.
I may change my mind and put these one in the long side instead of the end.
Not liking the lack of room to work in the end.
I planned on sewing it in and them moving my needle over to get right on the edge and then the color wouldn't show.
But having problems so I may take it out and start over.
It's a long time until Christmas decorating time . Thanks Goodness