This is a Vertical Slit pocket done on the passap in double bed knit. I think this would look good on a regular stockinette stitch sweater. Don’t know that I like the pocket going straight across. Items would fall out so I think this would be for warming hands or just decoration. Too much work for decoration for me ! The pocket is made first and attached by hand after and it is single knit fabric to eliminate bulk in front.
Vertical Slit Pocket on the Passap