300 Thread Count Mattress Protector vs Vintage Linen Bed Cover: which is safer?

Where these two actually differ

• We flag Flame retardants (undisclosed type), Volatile organic compounds (VOC) from waterproof coating, Coating degradation and microplastic release and Formaldehyde resin finishes on the Beautyrest and not on the Parachute.
• We flag Azo dyes or heavy metal pigments, VOC off-gassing or odor and Mildew or mold growth if damp on the Parachute and not on the Beautyrest.
• The Beautyrest is Polyester/cotton blend with proprietary waterproof/stain-resistant coating (unspecified) where the Parachute is 100% linen, no reported coating, which is most of the difference in these two grades.
• The gap is 45 points, wide enough that this is not a close call, and the Parachute is the one to buy.
• We are less certain about the Beautyrest grade, at 42% confidence against 82%, because it discloses less.