At this point I’ve gotten pretty good at sewing them. Used to take me about 3 times longer than it does now. And it’s still getting easier each time.
I thought of gluing them too, but the obstacle is how to hold the edges together long enough for the glue to set. While also avoiding getting glue in spots that will later contact skin. And allowing for multiple layers to go over each other (can’t glue the face of each side together making a raised seam).