Base fabrics for cross sew are evenly woven and cross sew needles (also referred to as tapestry needles) have more substantial eyes and therefore are blunter than normal sewing needles. You use the same type of threads and floss as you are doing in common hand embroidery. The concluded Internet https://lukasiheay.alltdesign.com/the-2-minute-rule-for-embroidery-stitching-50582041