Fourmy By Cintas White W/ Blue Stripes Uniform Shirt Short Sleeves vs Boys Classic Fit Flat Front Pant: which is safer?

Where these two actually differ

• We flag Azo dyes in polyester-cotton blends, Heavy metals in pigments (indigo/blue dyes) and Skin irritation from residual dye or sizing compounds on the Cintas and not on the Dickies.
• We flag Azo dyes and colorants, Antimony in polyester, Heavy metals in dyes and pigments and Residual solvents or sizing agents on the Dickies and not on the Cintas.
• The Cintas is cotton/polyester blend, no stated treatment where the Dickies is cotton/polyester blend, no special coatings, 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.