Is FITS PFAS-free?
Across 8 graded products, FITS averages F (37/100). On disclosure, the brand says nothing publicly about PFAS. None of its products grade C or better yet. Grades are model-based estimates, not lab results.
Graded and flagged D and F, we’d swap these
FITS
Original Full CUSION Merino Wool Hiker Crew Socks
Merino wool blend (primary fiber)
Lower concern, merino wool socks carry minimal PFAS risk unless treated with water-resistant finishes not disclosed.
⚠Risky category by default
FITS
Original Fit Crew Socks
Cotton/cotton blend knit fabric
Lower-concern baseline sock; no known PFAS triggers, but brand makes no disclosure.
⚠Risky category by default
FITS
Rugged Max Cushion Merino Wool Boot Socks
Merino wool blend (primary fiber)
Lower PFAS concern; natural fiber base with no disclosed treatments, though brand transparency is absent.
⚠Risky category by default
FITS
Frogg Toggs Waterproof Crew Socks
Polyester microfiber with water-repellent coating (water-repellent coating) treatment
Skip unless brand discloses water-repellent coating chemistry, waterproof socks commonly use PFAS.
⚠Waterproof or stain-proof treatment
FITS
Showers Pass Men's Crosspoint Waterproof Mountain Sock
Merino wool blend with water-repellent coating (water-repellent coating) treatment
Waterproof socks carry inherent PFAS risk; no brand disclosure means lower confidence in safety.
⚠Waterproof or stain-proof treatment
FITS
Mid-Calf Waterproof Breathable Hiking Socks
Merino wool blend with water-repellent coating (water-repellent coating) finish
Skip until FITS discloses water-repellent coating chemistry or pursue verified PFAS-free hiking socks.
⚠Waterproof or stain-proof treatment
FITS
NRS HydroSkin 0.5 Wetsocks
Neoprene or synthetic rubber base with water-repellent coating (water-repellent coating) coating
Moderate concern: wet-apparel water-repellent coating treatment frequently uses PFAS, but NRS/FITS makes no public disclosure either way.
⚠Waterproof or stain-proof treatment
FITS
DexShell Trekking Waterproof Socks
Merino wool blend with waterproof coating (unspecified)
Waterproof socks with unspecified water-repellent coating, PFAS risk unclear; contact brand for coating details before purchase.
⚠Waterproof or stain-proof treatment
Every grade uses the same public rubric. How grades work →