Men's Light Weight Quick Dry Moisture Wicking Top with 40+ UPF Protection vs Men's Force Relaxed Fit Short-Sleeve Pocket T-Shirt: which is safer?

Where these two actually differ

• We flag Undisclosed DWR coating chemistry (likely PFAS or fluorinated alternatives), Formaldehyde or formaldehyde-releasing finishes (wrinkle/shrink resistance) and Volatile organic compound (VOC) off-gassing from synthetic blend and treatments on the Calvin Klein and not on the Carhartt.
• We flag Azo dyes and Microfiber shedding on the Carhartt and not on the Calvin Klein.
• The Calvin Klein is Synthetic blend with moisture-wicking and UPF treatment where the Carhartt is 100% cotton jersey knit, untreated, 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 Carhartt is the one to buy.
• We are less certain about the Calvin Klein grade, at 45% confidence against 78%, because it discloses less.