Men's Regular Fit Non-Iron Dress Shirt vs Men's Farrier's Work Shirt: which is safer?

Where these two actually differ

• We flag Durable press resin (likely PFAS-based), Formaldehyde in resin cross-linking, Synthetic fiber shedding (microfiber release) and Allergen or sensitizer risk from finish on the Brooks Brothers and not on the Patagonia.
• We flag Formaldehyde releasers in durable-press resins and Chemical off-gassing or skin irritation from finish residues on the Patagonia and not on the Brooks Brothers.
• The Brooks Brothers is Cotton blend with durable press/non-iron finish (likely PFAS-based durable press resin) where the Patagonia is Organic cotton, standard construction, which is most of the difference in these two grades.
• The gap is 70 points, wide enough that this is not a close call, and the Patagonia is the one to buy.