ECR4Kids P is for Parachute Activity Rug vs Rib Wool Rug: which is safer?

Where these two actually differ

• We flag Flame retardant chemicals (brominated or phosphorus-based), Residual dyes and finishing chemicals (azo dyes, formaldehyde-based resins), Microfiber shedding and inhalation from worn areas and Volatile organic compounds (VOCs) from dyes and finishes off-gassing on the Parachute and not on the Parachute.
• We flag Heavy metals in wool dyes, Pesticide residues in raw wool fiber and Dust and fiber inhalation from shedding on the Parachute and not on the Parachute.
• The Parachute is polyester blend fabric, parachute construction where the Parachute is wool fiber, no reported topical treatment, which is most of the difference in these two grades.
• These two are level, close enough that price and fit should decide it rather than our grade.