Period underwear, period pants, period panties (whatever you want to call them) are having a bit of a moment right now. And, let’s be honest what’s not to like? Comfortable, eco-friendly, and easy-to-use; period underwear really does have it all.

Maybe you’ve never tried period underwear before. Maybe you think they’re a myth. You might even think they’re gross (btw they’re not). We’re here to give you the low-down so you can figure out whether they’re the right fit for you. This period-packed guide has everything you need to know about period pants — so get absorbing!

The history of reusable period products

Before we begin to talk about period undies, we have to talk about reusables more generally. By that, we mean period products that can be reused again and again.

Reusable products are the original period products. From angiangi, to lint, and buffalo skin to fabric rags (“on the rag” get it!?) people were using all kinds of reusable items before disposable pads and tampons came along. Even the menstrual cup was a pre-disposable invention patented in 1867. 

Period underwear is part of the long evolution of reusable menstrual products.

The Basics

What is period underwear?

As we’ve just said, period undies are pretty awesome. But what are period underwear? Put simply, period undies are underwear that are specifically designed to absorb menstrual blood. It’s a complete replacement for pads, tampons, and cups. You just pull up and period.

The benefits are endless; reduced monthly waste (the planet says thanks), more comfort, breathable (goodbye irritation), and more convenience because you don’t need to buy new products every month (hello saving $$$).

Do period underwear really work?

Are period underwear worth it? TLDR; yes thanks to modern technology! 

But, you’re probably wondering what that tech is and how period underwear works. The magic comes from the triple-layered fabric. Layer one is our special moisture-wicking fabric that draws fluid away from your body; it’s followed by a super absorbent core that absorbs your period blood. This is all surrounded by our special leak-proof membrane that catches any of those stray blood drops. 

AWWA products are built for comfort and performance. Don’t believe us? All our products are lab-tested and verified by third-party data to meet our high standards for absorbency and leak protection. So we’re period-proven.

How much does it cost to use period underwear?

Let’s be real here, transitioning to period underwear can feel like a big upfront investment. Period underwear can range anywhere from $15 to $50 each — and since most people need around 3 to 5 pairs per cycle — that can rack up quite a big bill.

But remember: every $ you spend now is working towards at least a $750 overall savings over 5 years. Better for your purse and the planet. 

We get that the upfront cost might be a little spendy, so we recommend swapping a couple of days for undies to start. Then, once you figure out what works for you, you can add more products to your roster later. It’s a big transition — no need to rush it. 

Oh and did we mention that we’ve have bundles and discounts of up to 15% off when you buy 3 or 5 undies? We’ve got your back (and front).

How to use and care for period underwear

There’s a bit of a learning curve when it comes to reusables, but once you know how it’s as easy as, well, wearing underwear.

The first thing you need to know is that our period underwear needs to be washed after 12 hours of use, or when the undies are full.

A couple of other tips to extend the lifespan of your undies: 

• Avoid bleach or fabric softener — they’re not best friends with our products and can decrease their performance and lifespan. 
• Don’t leave your pads soaking in water — this can lead to bacterial growth and mold. 
• Avoid frequent use of bleach products — yes they remove blood stains but they’re also harsh on natural fibers.
• If you’re out and about, living your best life, you can carry a bag with you — wet bags are great for this — to hold the period underwear ready for rinsing and washing when you get back home.

How do I wash period underwear?

Right now you’re ready for the main event. Washing your undies. It’s really simple: once you’re done with them, rinse them out in cool water and then toss them in the washing machine with your regular laundry. Then, either line dry or put them in your dryer at the lowest temp. As with any garment, wash them with like colours. 

Now if you want to get technical, here are some top tips: 

• Rinse the gusset in cold running water until they run clear before adding them to your laundry. 
• Hang to dry  — it saves energy and prolongs the life of your undies! 
• If you’re a hand washer — only use a very small amount of a detergent specifically formulated for washing clothes and be sure to rinse well — don't use concentrated soaps or other hand and dish soaps, as these can leave behind residue that will reduce the effectiveness of your undies.

If you’re only going to be doing laundry once a week, it’s ok to rinse out your undies and leave them somewhere with good airflow until laundry day. See, we told you it was simple!

How many pairs of period underwear do I need?

Everybody is different and you know your flow best. How many pairs you’ll need depends on the heaviness of your flow and the absorbency you choose. As a general guide, we recommend a pair for each day you bleed. That said, periods are unpredictable so you may want to purchase some extras that you can keep on hand, just in case you’re not feeling that big pile of washing.

How do you know when period underwear is full?

As we’ve said, starting with reusables takes a little bit of trial and error. As your flow is unique to you and can vary across your cycle, you’ll start to get to know how your undies deal with each day of your bleed.

That being said, there are some signs to look out for:

• Is there blood at the seams of your undies?
• Does the gusset (the part closest to your body) feel heavy? 
• Does the gusset feel heavy or stiff compared to when it was freshly washed? 
• Is there blood on the gusset that hasn’t been absorbed?

If you notice any of the above it’s probably time to change. So give those undies a rinse and pull out your next pair. 

Do period underwear smell?

Contrary to popular belief, period blood doesn’t actually smell. As with other blood, it has a slight metallic smell but only has a strong odor once it has mixed with air. This smell is the same whatever product you’re using — pad, tampon, cup, and even period underwear. 

Here at AWWA, we’re using innovative materials like Tencel™ which makes our undies less susceptible to odor-causing bacterial growth. So, if you take proper care of your underwear (as we’ve told you how), there’s no reason your underwear should smell.

Can I sleep with period underwear?

No one wants to be dreaming about period leaks. Nightmare! That’s why you can be sure to sleep tight (and comfortable) in our period underwear.

Period underwear can be worn overnight for up to 12 hours so doesn’t need to be changed in the middle of the night. And thanks to its cozy, breathable, and soft design with tons of coverage you’re pretty much covered for a sound sleep.

Period underwear for swimming

Since our undies are made with super-absorbent fabrics, we don't recommend wearing them while swimming. We have some really amazing period-proof swimwear for beach or pool days.

What’s the big deal? 

What about the products I use now?

Period underwear absorbs more, saves you money, and does all that without harming the planet.  So if you’re a comfort-seeking, eco-conscious individual these might be the best choice for your body, your values, your lifestyle, and the planet.

Since switching to reusables can come with some learning (and a price tag), let’s break down the pros and cons of period undies: 

Things to consider:

You will be sitting in your period blood (just like a pad). But it won’t feel like it and you definitely won’t notice thanks to the power of absorbency fabrics.

If your period undies are full you will need to change them — which can be a bit of a pain in a public restroom. And then you need to carry those undies around until you’re ready to wash them at home. Annoying but if you come prepared with a wet bag and an extra pair, you’re good to go. 

Things to love: 

Every dollar you invest in undies now is working towards a $750 saving over five years.

They’re one of the most simple period products to use. All you have to do is pull up your undies and get on with your day (until it comes to wash time). 

Period undies are so comfy and breathable — you can forget about irritation and chafing.

Did we mention they’re fantastic for the environment? Each year, over 20 billion pads, tampons, and applicators enter landfills and waterways in North America. Many of these products take over 500 years to biodegrade. Switching to AWWA underwear reduces waste by 99% and C02 emissions by 95%. 

Period undies are pretty damn good-looking. I mean have you seen our TENCEL™ High Rise and Cheeky Briefs? They’re super cute. 

Do you bleed less with period underwear?

I know we said period undies were magic, but sadly they’re not that magical. Period underwear is just like any other product so doesn’t have an impact on how much you bleed, your period symptoms or increased period cramps or blood clots. 

How do I make the move to sustainable products?

That was a hell of a lot of info. So if you’re feeling overwhelmed. We got you! Here’s our best advice for taking a step into the sustainable lane. 

Make it work for you:

Switching to reusables can feel like a big change with a big price tag so making sure you find a product that suits your current lifestyle, is the best way to secure success.

Don’t go the whole blob:

Remember this doesn’t have to be an all-or-nothing situation. Start slow and ease your way into the sustainable flow. It’ll be better for your period and confidence if you try to slowly swap out your everyday products for sustainable ones.

Flow with the facts:

Aside from the environmental benefits of reduced monthly waste, reusable menstrual products are more comfortable and breathable, more convenient because you don't have to buy them every month and they also save money in the long run. Think of the benefits and the rest will flow. 

Don’t give up:

Maybe you don’t vibe with the first product you try — that’s ok! You can always try something that’s more suited to you and your flow. 

And most importantly — remember we’re here whenever you need us. We answer these questions every single day so you can always find what you need right here.

Which period product is right for me? 

Decisions, decisions, decisions. It’s not an easy choice, but we’re here to lend a hand. Here are all the facts laid out for you, so you can make an informed decision. Need help deciding? Take our Know Your Flow Quiz and get synced up with the perfect product for you. Remember your body, your choice!