No. The right answer depends on the product and logistics system.
Paper can be a good choice for rigid or moderately durable goods, but it may require more material, added coatings, or internal cushioning for moisture-sensitive products.
Flexible film mailers can be lightweight and space-efficient, especially for soft goods. Their main challenges are material sourcing and end-of-life handling.
I would compare:
- product protection;
- package weight;
- empty storage volume;
- damage rates;
- coatings and adhesives;
- recycled or renewable content;
- local recovery infrastructure;
- total material per shipment.
Replacing a lightweight mailer with a heavier package that increases damage or transport volume is not automatically an environmental improvement.