Knix Super Leakproof High Rise
At a glance
Summary
Knix Super Leakproof High Rise scores 50/100. The brand was acquired by Essity (parent of Tena, Libresse, Bodyform) in 2022 — the same disposables conglomerate that bought Modibodi. The outer fabric is 80% nylon and 20% spandex (fully synthetic), with the patented 4-layer Fresh Fix lining built on synthetic fibers and a proprietary antimicrobial treatment. Knix publishes third-party PFAS-free test results and BPA-free verification, which is meaningful given the industry's history. But the all-synthetic construction sits at the higher end of microfiber shedding, and the proprietary antimicrobial treatment is not fully disclosed. Cleaner than Thinx but less clean than brands using organic cotton or modal.
Key ingredients 5
Third-party PFAS-Free TestingVery Good
Knix publishes lab-verified PFAS-free results — a meaningful disclosure given the industry track record.
See more about Third-party PFAS-Free Testing →Nylon (80%)
Petroleum-derived synthetic fiber forming the main shell. Sheds microplastics in laundering and is not biodegradable.
See more about Nylon (80%) →Spandex / Elastane (20%)Neutral
Synthetic elastic fiber for fit retention.
See more about Spandex / Elastane (20%) →Proprietary 4-Layer Leakproof Lining
Multi-layer synthetic absorbent system with undisclosed exact composition. Includes polyester moisture-wicking, absorbent rayon, and a polyurethane waterproof barrier.
See more about Proprietary 4-Layer Leakproof Lining →Fresh Fix Antimicrobial Treatment
Proprietary silver-based antimicrobial finish. Silver-treated textiles can leach silver ions during laundering, which raises ecotoxicity concerns even though skin absorption is low.
See more about Fresh Fix Antimicrobial Treatment →Get the full breakdown in the Scout appTake Scout shopping
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