You can also make notched pallets for the zipper and use standard squeegees. 1/4" masonite on top of pallet, leave a 1/2-3/4" channel, set up pallets so the zipper is over the end of the pallet (M&R pallets only) shim screen with same masonite thickness under screen frame, raise squeegees. This can ruin a good squeegee, so we did create a set just for zippered sweats. This method helped with over seam printing as well.