PFAS (“forever chemicals”) are man-made substances often used in non-stick cookware, water-resistant fabrics, and food packaging. They don’t break down easily, which means they can build up in the body and environment over time.

Why it matters:

• Your skin is your body’s largest organ — and period underwear sits against your most sensitive areas.
• Even small amounts of PFAS have been linked to hormone disruption, reproductive issues, weakened immunity, and other health concerns.

That’s why every Nue Phase fabric is certified PFAS-free — so you can feel safe, every cycle.

At Nue Phase, what touches your skin should be clean, safe, and gentle.

• Our gussets use 93% organic cotton (with a touch of spandex for durability and absorbency). This blend is breathable, chemical-free, and kind to sensitive skin.
• 100% cotton alone doesn’t wick moisture or hold up with wear — so our mix balances purity with performance.
• Choosing organic reduces exposure to pesticides and synthetic materials, keeping irritation away and comfort high.

The result: underwear that protects during your period and feels good every day.

We didn’t stop at the lab. Every pair has been tested by real women through long workdays, overnight wear, workouts, and heavy flows.

Our team adjusted design details. From absorbency and gusset length to fit and comfort — until every style met our standards.

Because protection should feel personal. Nue Phase is made by women, for women, to protect every body and every flow.