The why
Spigen. Polycarbonate and TPU cases across the Ultra Hybrid, Tough Armor, and Liquid Crystal lines. Daily skin contact with polycarbonate carries documented BPA residual migration (NSF eyewear data ~0.53 micrograms per day, below California MADL but above zero); TPU components may release brominated flame retardants via dermal contact when present (Bessa 2023 ES&T, sweat increases bioavailability). No sustainability or clean-product claims publicly verified. Score 4-5. Ingredients verified 05 2026.