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Inside Out: Understanding How Period Underwear Works

January 25, 2024

Inside Out: Understanding How Period Underwear Works

Period underwear has revolutionized the way women experience their menstrual cycle. Designed to be worn like normal briefs, period underwear offers a sustainable and comfortable alternative to traditional sanitary products. In this article, we will delve into the workings of period underwear, explore its benefits, provide tips for choosing the right type, and discuss best practices for using it.

Key Takeaways

  • Period underwear is designed to be worn like normal briefs and has an absorbent gusset to hold menstrual flow.
  • It offers a sustainable and cost-effective alternative to disposable menstrual products like pads and tampons.
  • Choosing the right period underwear involves considering factors such as absorbency, style, and fit.
  • Period underwear can be worn on its own or as a backup with other menstrual products like tampons or menstrual cups.
  • Best practices for using period underwear include proper washing and care, choosing the right absorbency level, and ensuring a comfortable fit.

Understanding Period Underwear

period underwear

How Period Underwear Works

Unraveling the mechanics behind period underwear unveils a thoughtfully engineered solution for menstrual comfort and confidence. Specifically designed for wear during menstruation, period underwear operates on a multi-layered principle.

Trendix period underwear, for instance, incorporates absorbent layers within its core to effectively secure and manage menstrual fluid. The main body fabric boasts moisture-wicking and anti-bacterial properties, ensuring a dry and fresh experience throughout the day and night.

Going the extra mile, these innovative briefs feature a waterproof leak-prevention layer, providing an additional layer of assurance for users. Designed to closely resemble everyday underwear, the inclusion of an absorbent gusset ensures efficient management of menstrual flow, keeping users dry and comfortable. The absorbent core, varying in composition, caters to different absorbency needs depending on the brand and style.

With sustainability in mind, period underwear emerges as a reusable alternative to disposable pads and tampons, offering an eco-friendly, cost-effective, and health-conscious choice for menstrual hygiene. Whether worn independently or as a backup with other menstrual products, period underwear stands at the forefront of modern menstruation practices, delivering a seamless blend of functionality and comfort.

Benefits of Period Underwear

Period underwear offers a sustainable and cost-effective alternative to disposable menstrual products like pads, tampons, and liners. This innovative underwear features a special absorbent gusset that helps prevent blood from leaking through, promoting better vaginal health and overall well-being. The Good Housekeeping Institute Textiles Lab's fiber scientists rigorously tested period underwear to find the best buys, ensuring that it meets the needs of individuals with varying body shapes, flow levels, and style preferences. The top picks for the best period underwear are carefully selected to provide maximum comfort and protection. When it comes to washing period underwear, following the right tips and guidelines is crucial for maintaining their quality and effectiveness. 

Choosing the Right Period Underwear

When choosing the right period underwear, it's important to consider your specific needs and preferences. Look for styles that suit your needs, whether it's for daytime protection, overnight use, or both. Fit is crucial, as period underwear needs to fit properly to prevent leaks while feeling comfy all day. Some testers found that period underwear can run small, so ensure a snug fit. If you're new to period underwear, try an overnight style for nighttime protection

The Good Housekeeping Institute Textiles Lab checked the absorbency of top-rated pairs using red cough syrup, a method also used by manufacturers to test pads and tampons. This ensures that the absorbency of the period underwear is thoroughly tested and reliable. Here are some key features to look for when shopping for period underwear:

  • Absorbency: Period underwear is available in different absorbencies, so it's important to have styles with a few different absorbencies to suit different days of your period.
  • Styles: Just like regular underwear, period underwear comes in various styles, so choose the ones that best fit your needs and preferences.

Remember, finding the right pair of period underwear can be challenging, but considering these key features will help you make the best choice for your needs.

Best Practices for Using Period Underwear

Period underwear can be worn on its own or as a backup with other menstrual products like a tampon or menstrual cup. It has become increasingly popular among teens and tweens due to its less bulky nature compared to traditional pads. However, concerns have been raised about the presence of perfluoroalkyl and polyfluoroalkyl substances (PFAS) in period underwear, which are manmade chemicals found in waterproof and nonstick products. This has led to questions about the safety of period underwear. To address these concerns, it's important to consider the materials, safety, and sustainability of period underwear. Here are some top picks for the best period underwear:

  1. Trendix
  2. TomboyX First Line Period Bikini
  3. KT by Knix Super Leakproof Underwear Bikini

For a more comfortable fit, it's recommended to choose the right style and size of period underwear. Additionally, it's advisable to use period underwear as a backup to other disposable menstrual supplies, especially for those with a heavy flow. Finally, for an improved period experience, consider exploring other options such as period swimwear and heating pads to soothe cramps.


In conclusion, period underwear is a revolutionary and sustainable alternative to traditional menstrual products. With its absorbent gusset and multiple layers of fabric, period underwear provides comfort, protection, and peace of mind. This eco-friendly option not only reduces waste but also offers a cost-effective and stylish solution for managing menstrual flow. Embracing period underwear is a positive step towards a more sustainable and comfortable period experience.

Frequently Asked Questions

How does period underwear work?

Period underwear is designed with an absorbent gusset that holds onto menstrual flow to keep you dry and comfortable. It can be worn on its own or as a backup with other menstrual products like a tampon or menstrual cup.

What are the benefits of period underwear?

Period underwear is a sustainable and cost-effective alternative to disposable menstrual products. It is designed to look and fit like everyday underwear while providing leak protection and comfort.

How do I choose the right period underwear?

When choosing period underwear, consider the absorbency, fit, and style that suits your needs. Look for styles that provide the right level of protection for different days of your period and ensure a comfortable fit.

Can period underwear be worn with other menstrual products?

Yes, period underwear can be worn with other menstrual products like pads, tampons, or menstrual cups. It can be used as a backup for added protection and peace of mind.

What are the best practices for using period underwear?

To ensure the best experience with period underwear, it is important to follow the care instructions provided by the manufacturer. Proper washing and drying techniques can help maintain the absorbency and effectiveness of the underwear.

Are there different styles of period underwear available?

Yes, there are various styles of period underwear available, including different absorbencies, fits, and designs to suit individual preferences and needs. Some styles are designed for overnight protection, while others are suitable for daily wear.

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