Why you can trust Thinx Inc. products

At its core, Thinx Inc. was founded to provide safe, comfortable, and sustainable options for people with periods and bladder leaks. Customer safety is important to us, and so is your trust. That’s why we’ll always be honest and transparent about how our products are made. From rigorous absorbency testing, to objective third-party tests of our finished products, here are all the steps we take to uphold the highest standards of product safety.

Our certifications and safety standards

All Thinx Inc. underwear are REACH compliant and STANDARD 100 by OEKO-TEX® certified [20.HUS.04850 | HOHENSTEIN HTTI], which means every component—from fabric to trim—is thoroughly tested for ecological safety, and passes. Our finished products also undergo third-party testing by Bureau Veritas, an accredited, globally recognized facility. This third-party testing puts your safety first, ensuring that all results are honest and objective.

Oeko-tex - Confidence in textiles - Standard 100 [20.HUS.04850 | HOHENSTEIN HTTI] tested for harmful substances

What are Thinx Inc. products made of?

It might seem like magic, but every Thinx Inc. product has layered technology built into the gusset that makes it moisture-wicking, odor-controlling, and absorbent.

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Gusset
components
LightestLightModerateHeavy Super

1. Moisture-wicking layer

Draws away wetness and neutralizes smells

95% Cotton / 5% Elastane

  • • One-way moisture-wicking functionality that moves moisture from the surface of the fabric and transports it away from the body to the second layer.
  • Agion®, an EU regulated anti-odor treatment using non-migratory silver zeolite and silver copper zeolite, is also applied to this layer.

100% Polyester

  • • One-way moisture-wicking functionality that moves moisture from the surface of the fabric and transports it away from the body to the second layer.
  • Agion®, an EU regulated anti-odor treatment using non-migratory silver zeolite and silver copper zeolite, is also applied to this layer.

2. Absorbent layer

Captures fluid in the gusset for all day dryness

96% Cotton / 4% Elastane

  • • Single jersey fabric with moderate absorbency capacity, treated with a hydrophilic softener for moisture management.

100% Polyester Microfiber Terry

  • • Thick terry fabric with greater absorbency capacity, treated with a hydrophilic softener for moisture management.
  • Agion® is also applied to this layer.

3. Moisture-impermeable layer

Prevents leaks and stays breathable

100% Polyester laminated with PU

  • • Polyester material laminated with a polyurethane-based film.
  • • This layer is moisture-impermeable and moisture vapor permeable for breathability.

100% Polyester laminated with PU

  • • Polyester material laminated with a polyurethane-based film.
  • • This layer is moisture-impermeable and moisture vapor permeable for breathability.

FAQs

How are Thinx Inc. underwear tested?

All Thinx Inc. underwear are certified based on the rigorous chemical safety requirements of the STANDARD 100 by OEKO -TEX®️ [20.HUS.04850 | HOHENSTEIN HTTI], and before we purchase raw materials from suppliers, we ensure that those suppliers are OEKO-TEX®️ certified, too. We also test our finished products through Bureau Veritas, an accredited, globally recognized third-party lab, to ensure they are compliant with REACH regulations.

Our absorbency testing, which tests the absorbency capacity of each style of underwear, is conducted at Bureau Veritas, too. We also conduct wear tests, which evaluate the absorbency capacity of each style of underwear when it’s worn by actual people with periods and bladder leaks, and use fit models to ensure our products sit just right.

Do Thinx Inc. products contain toxic metals or nanoparticles?

No, Thinx Inc. products do not contain toxic metals or engineered nanoparticles. The anti-odor layer in our products is treated with Agion®, an EU regulated treatment that uses safe, non-migratory silver zeolite and silver copper zeolite. These compounds stay on the surface of the underwear and don’t travel into your body.