Flag of Canada sewn with 200D nylon. This material has been industry standard for many years. Referred to as 'heavy weight' nylon. Fly end is reinforecd with 4 rows of stitching.
200D / 210D - 200 and 210 Denier Nylon, 3 times heavier than 70D. Hand sewn flags are sewn on 200D. Fabric is marine grade & exceeds government standards.