Are Period Underwear Safe? What You Need to Know

Are Period Underwear Safe? What You Need to Know

Let's talk about something that’s changing the game for menstrual care—period underwear and here at Ruby Love we are leading the way! You've probably heard of them, maybe even considered trying them, but a question lingers: Are they safe? Understanding the ins and outs of period underwear is crucial to making an informed choice for your menstrual health.

What is Period Underwear?

Period underwear is designed to absorb menstrual blood without the need for additional products like pads or tampons. They look and feel like regular underwear but come equipped with multiple layers of fabric engineered to keep you dry and comfortable. Ruby Love, as wella s other brands like Thinx, Knix, and Modibodi have popularized these products, offering various styles to fit different body types and flow levels.

Our period underwear come in bikini, high-waist, hipsters and briefs while also offering options for period loungewear and period activewear. Now, how exactly do these magical panties work? 

How Does Period Underwear Work?

The magic lies in the layers. Typically, period underwear comprises several layers: a moisture-wicking top layer to keep you dry, an absorbent core to hold the blood, and a leak-resistant outer layer.

Ruby Love products feature smart, intuitive, patented technology that offers maximum absorption, protection against leaks and stains, peace of mind, and complete discretion, so period days can be like every other day. The technology features a discrete, built-in absorbent organic cotton liner that is perfectly angled to collect your flow. Read more about how it works and see the video below. 

Benefits of Using Period Underwear

Period underwear offers numerous benefits. They’re incredibly comfortable and can be more convenient than carrying around pads or tampons. They also have a significant environmental impact by reducing the waste generated from disposable menstrual products. Over time, they can be cost-effective too, as they’re reusable and can last for years with proper care.

Potential Concerns with Period Underwear

Despite their benefits, there are some concerns to address. Hygiene and proper maintenance are crucial to avoid infections. The materials used in period underwear should be non-toxic and free from harmful chemicals. Some users worry about allergic reactions or bacterial growth due to prolonged wear.

Hygiene and Maintenance

Keeping your period underwear clean is vital. They should be washed in cold water, either by hand or on a delicate cycle in your washing machine, and then air-dried. Avoid using fabric softeners or bleach, as these can damage the absorbent layers. Proper storage in a clean and dry place is also essential to maintaining their efficacy.

Material Safety

One of the biggest concerns with feminine hygiene products is the use of PFAs. PFAS, or perfluoroalkyl and polyfluoroalkyl substances, are artificial compounds. They're widely used in many consumer goods like carpets, non-stick cookware, outdoor gear, including you guessed it —feminine hygiene products.

Research shows that exposure to PFAS can lead to pretty serious health effects. To avoid PFAs in feminine hygiene products look for organic and natural feminine hygiene products, which are less likely to contain PFAS compared to more synthetic materials like rayon or polyester.

Ruby Love’s products contain no PFAs, no PULs or nano-silver, helping to reduce landfill waste

Health Risks Associated with Period Underwear

Some users may experience allergic reactions to the materials used in period underwear. There’s also a risk of bacterial growth if the underwear is not changed regularly or washed properly. It’s recommended to change your period underwear every 8-12 hours to maintain hygiene.

Comparing Period Underwear with Other Menstrual Products

When comparing period underwear to traditional menstrual products like pads, tampons, and menstrual cups, it’s clear that each has its pros and cons. Pads and tampons are disposable and may be more convenient in certain situations, but they generate a lot of waste. For example, our period underwear can save you from using 700 pads or 800 tampons. Menstrual cups are reusable like period underwear but can be messy to use. Period underwear offers a balance of convenience, sustainability, and comfort.

Choosing the Right Period Underwear for You

Selecting the right period underwear involves considering your flow, style preference, and any sensitivities to materials. This is where we at Ruby Love have you covered as we offer a range of styles, from briefs to boyshorts and hipsters, and different levels of absorbency. It’s important to read reviews and perhaps try a few brands to see what works best for you. Feel free to read more of our press and reviews to see why so many people love our period underwear. 

Cost Comparison: Period Underwear vs. Traditional Products

While the initial cost of period underwear can be higher than a pack of pads or tampons, the long-term savings are substantial. A single pair of period underwear can last for years, reducing the need for monthly purchases of disposable products. Over time, this not only saves money but also reduces environmental impact.

Tips for First-Time Users

If you’re new to period underwear, it’s important to start with a pair designed for light to moderate flow and gradually work up to heavier absorbency if needed. Wear them around the house first to get used to the feel. Remember, it might take a few cycles to fully adjust to using them.

For reference, the absorbency level for our period underwear is equivalent to about 2.5-3 tampons depending on your flow and maintenance. But, there is no such exact amount because blood/urine flow varies for everyone.

Ruby Love’s reusable, double-sided pads can also be used for additional protection. If wearing a sanitary pad, pads are locked in and securely held in place in the dri-tech mesh gusset, as well, the dri-tech design helps prevent side, front, or back leaks.

In addition, you can take the guesswork out of what to purchase and sign up for our first-period kit. It has everything you need and more to tackle your first period with ease! 


Period underwear can be a safe and effective option for menstrual care when used and maintained properly. They offer numerous benefits, including comfort, convenience, and environmental sustainability. However, it’s essential to choose products made from safe materials and follow hygiene guidelines to minimize health risks. With the right care, period underwear can truly revolutionize your menstrual experience.

Check out our reviews and see for yourself!

FAQs about Period Underwear Safety

1. How long can I wear period underwear?

Period underwear can typically be worn for 8-12 hours, depending on your flow and the underwear's absorbency level. It’s best to change them as you would any other menstrual product to maintain hygiene.

2. Can period underwear be used overnight?

Yes, we offer period sleepwear designed for overnight use. These typically have higher absorbency levels to handle a full night's flow.

3. Are there any side effects of using period underwear?

Some users may experience allergic reactions to certain materials. Proper washing and maintenance are essential to prevent bacterial growth and infections.

4. How do I choose the right size?

Choosing the right size involves checking our sizing guide and considering your usual underwear size. Ruby Love offers detailed fitting guides for adult and teen sizes.

5. Can period underwear replace other menstrual products completely?

For many users, period underwear can replace pads and tampons entirely. However, this depends on personal preference and your menstrual flow. Some may prefer to use them in combination with other products.

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