A Guide to Reusable Menstrual Products: How Period Underwear Works

As more people look for sustainable and cost-effective menstrual care, reusable products like menstrual cups and period underwear are becoming increasingly popular. Not only are they better for the environment, but they also offer comfort, reliability, and convenience. In this blog, we'll focus on how period underwear works, what materials are used, and which brands—including the innovative Nyx Collection—are worth trying.

🩸 What Is Period Underwear?

Period underwear is designed to absorb menstrual fluid just like a pad, but it looks and feels like regular underwear. Thanks to multiple layers of advanced fabric, it keeps you dry, odor-free, and leak-proof.

⚙️ How Does Period Underwear Work?

Most period underwear uses 4-layer to 5-layer technology:

  1. Moisture-wicking layer: Keeps you dry and pulls fluid away from the skin.

  2. Absorbent layer: Holds menstrual fluid—can absorb anywhere from 1 to 5 tampons’ worth.

  3. Leak-proof barrier: Prevents any leakage onto your clothes.

  4. Outer layer: Breathable and comfortable fabric like cotton, modal, or bamboo.

Some designs include an extra antimicrobial or odor-controlling layer.

🌿 Common Fabrics Used in Period Underwear

  • Organic Cotton: Soft, breathable, and gentle on skin

  • Modal: Made from beech trees; more absorbent than cotton

  • Bamboo: Naturally antibacterial and moisture-wicking

  • Spandex/Elastane: Adds stretch and comfort

These fabrics are often blended to balance comfort, stretch, and absorbency.

🛍️ Recommended Reusable Menstrual Underwear Brands

1. Nyx Collection – Shop Now

  • Product: Women’s Menstrual Underwear Leak-Proof 4-Layer Technology (Medium Flows)

  • Key Features:

    • 4-layer leak-proof design

    • Soft and breathable fabric

    • Reusable and eco-friendly

    • Affordable pricing and stylish design

2. Thinx

  • One of the first mainstream period underwear brands

  • Offers different absorbencies and styles

3. Modibodi

  • Great for heavy flows and postpartum

  • Offers styles for teens and maternity

4. Knix

  • Known for comfort and seamless design

  • Offers underwear and activewear for periods

5. Saalt Wear

  • Focus on sustainability

  • Stylish and modern fits

💚 Benefits of Reusable Menstrual Products

  • Eco-Friendly: Drastically reduces waste from pads and tampons

  • Cost-Effective: One-time investment for years of use

  • Comfort: Feels like regular underwear

  • Odor Control: Special layers neutralize smells

  • Great for Teens: Non-invasive and easy to use

🧼 How to Care for Period Underwear

  1. Rinse in cold water after use

  2. Machine wash (cold, gentle cycle)

  3. Air dry—no fabric softener or dryer

Proper care will keep your underwear effective for up to 2–3 years.

📚 Resources for Further Reading

Reusable menstrual products are not just a trend—they're a smarter, safer, and more sustainable choice. Whether you're new to periods or looking to make a greener switch, products like the Nyx Collection period underwear make it easier and more comfortable than ever.

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