High Density Exercise Yoga Mat with Strap 12mm vs All in Motion Yoga Mat Rubber: which is safer?

Where these two actually differ

• We flag VOC off-gassing (formaldehyde, other volatiles), Bacterial or mold growth if wet-stored and Rubber allergens or sensitization on the CAP Barbell and not on the Iyengar Yoga.
• We flag Natural rubber latex allergen (if natural rubber composition) and Microplastic shedding from surface degradation on the Iyengar Yoga and not on the CAP Barbell.
• The CAP Barbell is NBR rubber foam (typically PVC or NBR-based) where the Iyengar Yoga is Rubber (likely natural or synthetic rubber), 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.