What’s Interval Underwear? (Plus the Greatest Manufacturers)

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As we grow to be extra centered on sustainability and being financially savvy, we have now to cease and assume. How a lot does caring for our month-to-month cycle add to the landfill? Most pads and tampons aren’t precisely recyclable or biodegradable. Apart from that, stocking up on interval merchandise every month provides up over time. What different choices do we have now? Nicely, many ladies are turning to “interval underwear.” 

What Is Interval Underwear?

Interval underwear are reusable, extra-absorbent panties. The thought is to scale back or remove the necessity for disposable menstrual merchandise like tampons and pads. So, for those who’re sick of coping with panty liners, pads, tampons, and even the menstrual cup, hold studying. Interval underwear generally is a unbelievable various — (or addition), relying on how you employ them. 

Interval underwear are panties designed with particular moisture-wicking gussets.  ( That is the thick half on the backside) that soaks up the menstrual circulate. The gussets may be manufactured from cotton, wool, or artificial materials, similar to fleece-like materials. 

Relying on the model, one pair of interval underwear can maintain as a lot liquid as 5 common tampons! Interval underwear have extra makes use of than the menstrual cycle. You may also use them for incontinence associated to maternity, postpartum, and exercises. You possibly can be taught extra about these pesky leaks and methods to repair your pelvic flooring right here. 

Interval Underwear Decisions 

Menstrual underwear is available in many sizes (from XXS to XXL) and cuts, identical to common underwear. You possibly can nonetheless get bikinis, hipsters, boyshorts, briefs, hi-waist, and hiphuggers. In case you’re involved about panty strains, don’t fear — they even make thongs! 

In addition they are available a wide range of materials, like cotton, bamboo, polyester, modal, and spandex/elastane. Most of the time, they’re a mix of those materials. (The waistband could be Spandex or elastane.) 

Because of this, you will get panties produced from lab-created or pure materials, like cotton and bamboo. Nonetheless, the gusset could also be manufactured from a distinct materials than the remainder of the underwear, because it must be absorbent.

Is Interval Underwear Protected to Put on? 

So, it seems like a good suggestion, however are interval underwear protected? There’s some concern that sure manufacturers have per- and poly-fluoroalkyl substances (PFAS).  These “perpetually chemical compounds” are sometimes present in waterproof materials like raingear as a result of they repel water. They’re linked to hormone imbalance, lowered fertility, immune system issues, and low delivery weight. 

Thinx, Inc., is a New York Metropolis-based model that serves as an umbrella for 3 totally different collections. Thinx is underwear to soak up intervals. For teenagers, there’s Thinx Teenagers. And Speax is underwear for bladder leaks. From 2020 to 2022, three class motion lawsuits have been launched towards Thinx for PFAS contamination. 

After consolidating these lawsuits into one, they reached a settlement in December 2022. Girls who had bought the underwear and have been involved about PFAS might submit a request for a refund or a voucher for a future buy.

PFAS testing seems to be for fluorine within the supplies. Thinx had fluorine in as much as 3,264 components per million (ppm), which may be very excessive. Different manufacturers that had smaller quantities of fluorine have been Knix (373 ppm), Maintain (as much as 71 ppm), Ruby Love (27 ppm), and Saalt (10 ppm). 

I’ve listed the panties that examined 0 ppm of fluorine beneath. 

Execs and Cons of Interval Underwear 

As you now know from the PFAS subject, there are execs and cons to sporting specialised interval intimates.

Execs of Interval Underwear

There are many execs of interval panties:

  • Environmentally Pleasant – Interval panties decrease month-to-month waste. Nonetheless, as I simply coated, the kind of materials issues. Some interval underwear manufacturers don’t simply have PFAS or fluorine. Some have artificial materials, like nylon and polyester, which come from petrochemicals. Aka what plastics are made out of. Washing these artificial supplies sheds microplastics into the water. These finally circulate into our groundwater, lakes, rivers, and oceans. That’s why you’ll wish to go for natural cotton, bamboo, and different pure supplies when potential. 
  • Main Up & Trailing Off – With busy schedules, it’s comprehensible if we often lose monitor of the precise day of our intervals. Typically we’re additionally too fast to place away the panty liner. That’s the place interval underwear can actually assist.
  • Nighttime circulate – Why danger staining the sheets? Interval panties work nicely by way of the evening.  
  • Postpartum bleeding – Vaginal births can result in postpartum bleeding, and sporting a tampon isn’t excellent. Thick pads may be aggravating; that’s the place interval panties are available! 
  • Backup Leak safety – Typically tampons leak, particularly with heavier circulate days. Interval panties can function insurance coverage.
  • Extra Comfy Than Pads – The gussets of interval underwear are a lot thinner than pads, so that they’re extra snug to put on. Interval panties transfer with you and don’t go off-center as menstrual pads can.
  • Much less Cramping – Some girls report much less cramping after they use interval underwear as a substitute of tampons. It is smart, as interval panties are non-invasive. 
  • Journey comfort – Lengthy flights could make it difficult to get to the toilet when we have to swap out a tampon. Interval panties can maintain a pair (or extra) of tampons’ price of circulate, supplying you with extra time (as much as 24 hours!). They’re an important addition to your journey packing listing. 
  • Machine-washable – You possibly can machine wash most interval underwear manufacturers, not less than after briefly soaking., making This makes them handy to clean and put on.

Cons of Interval Underwear 

Some potential downsides embrace the next: 

  • PFAS and different chemical contamination – Common PFAS, fluorine, and different chemical exposures could also be hazardous over time. That’s particularly the case for something in shut contact together with your non-public components.
  • Price: Interval underwear are typically dearer than common underwear. They vary from $12 to $55 per pair.  
  • The washing out course of – Handwashing a number of the underwear in chilly water earlier than machine washing isn’t so enjoyable. Nonetheless, as talked about, merely soaking first could also be an possibility.
  • Want for altering – Heavy circulate days might require altering mid-day, identical to pads or tampons.
  • Potential for leakage – Sadly, not all interval panties are leakproof. Whereas some designs can maintain as much as 5 and even 10 tampons’ price of liquid, others maintain two or fewer.
  • Potential for odor – Relying on the fabric, utilization (interval vs. incontinence), and time sporting them, there’s a possible to construct up an odor.

The professionals and cons rely upon which manufacturers, cuts, and materials you get. Verify the most recent critiques to make the perfect buy.

How one can Take Care of Interval Underwear

The particular cloth in interval underwear requires some particular care. Go for mild soaps and detergents over harsh detergents and bleach. Additionally, keep away from utilizing cloth softeners or different chemical compounds.

High Interval Underwear Manufacturers

The perfect interval underwear is freed from toxins, snug, and simple to take care of. These are a number of the hottest chemical-free manufacturers.

The Interval Firm’s 

The Interval Firm’s “The Excessive-Waisted” underwear will get glorious critiques. This firm additionally examined 100% freed from PFAS and makes use of OEKO-TEX licensed 95% natural cotton (the remaining 5% is polyester). They’re additionally inexpensive, beginning at $12 a pair, and might final wherever from 2 to 10 years. 


Modibodi interval panties are 95% bamboo viscose with 5% spandex so as to add stretch. The liner is a mix of merino wool, polyester, and polyamide. Modibodi’s natural cotton kinds are licensed by the World Natural Textile Normal (GOTS). They’re estimated to final not less than 2 years. Unbiased lab testing discovered zero PFAS. In case your man has leakage points, Modibodi has him coated! They’ve a males’s line as nicely.


Bambody is one other clear model that examined freed from PFAS and different chemical compounds. The identify comes from their use of bamboo cloth, which is mixed with cotton and spandex. The liner is artificial, although. Bambody is licensed by way of OEKO-TEX. They have been additionally licensed protected by the Hohenstein Textile Testing Institute in Germany. They’re estimated to final a couple of yr and a half.


Aisle is a sustainable interval underwear model based mostly in Canada. They use unbiased testing to make sure there aren’t any detectable ranges of PFAS (lower than 1 ppm). Their supplies embrace natural cotton, Tencel, recycled polyester, technical cotton, thermoplastic polyurethane, and different supplies. The liner is manufactured from Truetex™ which is a mix of hydrophilic and hydrophobic fibers. Aisle is licensed by OEKO-TEX and Management Union, below the OCS (natural content material commonplace). They need to final about 3 years.


Whereas WUKA wasn’t a part of the research, they do common testing to make sure their merchandise are PFAS-free. They use GOTS (World Natural Textile Normal) licensed natural cotton, recycled plastic, and Tencel modal fibers from beech timber. Tencel modal is biodegradable and compostable, so it doesn’t burden our landfills. WUKA can also be licensed by way of OEKO-TEX. Plus they’re estimated to final not less than 2 years. 

A few of these firms even have swimsuits, bras, sleepwear, and different intimates.

Interval Underwear: Backside Line

Subsequent time you want a brand new pair of underwear, take into account getting some interval panties. You could possibly vastly reduce and even remove menstrual merchandise out of your funds. They’re accessible and simple to search out – you’ll even see them on Amazon. However for those who’d favor to buy regionally and really feel the material before you purchase, you may also discover them at pure merchandise outlets and department shops. Interval panties may help take the stress out of menstruation! 

Have you ever tried interval underwear? What has your expertise been? Yay or Nay? Any advisable manufacturers? Share with us beneath!

What’s Interval Underwear? (Plus the Greatest Manufacturers)

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