Thinx Period Underwear Review | Period Underwear Guide

I’m soooo happy that I’ve made the best decision by switching to Thinx – period underwear. I’m sure many of you heard about period underwear but are skeptical to buy it. A few don’t aware of the existence of period underwear. So, I’ll share everything from what is period underwear, to how to buy it, use it, wash it and maintain it for longer life. Keep reading to get a discount!

DISCLOSURE: This post may contain affiliate links, meaning I get a commission if you decide to make a purchase through my links, at no additional cost to you.

What is period underwear/ period panty?

Period underwear or period panties is a great replacement or a sustainable swap for the disposable period products like pad/napkin or tampons. It looks like normal underwear but it absorbs our period.

Note: Some people with a heavy flow use the combination of both Menstrual Cup and Thinx – Period Underwear. But, personally, I just use Thinx and nothing else.

They are not only comfortable but also great for the environment!

How pads/ tampons are bad for the environment and for us?

How many years does a pad take to decompose?

Believe it or not, a single woman can generate up to 125 kg of non-biodegradable waste through her menstruating years alone. Studies have shown that one sanitary pad could take from 500 to 800 years to decompose as the plastic used is not bio-degradable, and can lead to health and environmental hazards. (Source)

Worldwide, it’s estimated that over 100 billion menstrual hygiene products are disposed of annually. In North America alone, about 20 billion sanitary napkins, tampons, and tampon applicators — which are not recyclable, since they’ve been in contact with human waste — are dumped into landfills yearly. When incinerated — a common practice in some developing nations — these products release toxic fumes, including carbon dioxide. (Credit)

Toxic Shock Syndrome:

Toxic shock syndrome (TSS) is a rare and potentially life-threatening illness that is thought to be caused by infection with certain types of bacteria, including Staphylococcus aureus. 

Women who have their period (are menstruating) are most likely to get TSS, as it is thought to be associated with tampon use. (Credit)

So, it is better to switch to period underwear not only for environmental concerns but also for our health benefits!

Benefits of Thinx – The Period Underwear:

No more stains – Thinx:

While I’m using the pads, I used to worry about my period stains all the time, especially during the night. I usually stain my bedsheets while I sleep not because my napkin got full but because of the slight movements or because it just happens to stain above my pads as it is not covered completely.

But Thinx is really close to my skin and it is covered up completely so no stains and I don’t have this stress anymore!

Thinx saves money:

When maintained properly, Thinx can last from 2 to 5 years. And so, no need of buying period products for years. Thus it saves a lot of money in the long run. Let’s do the math.

An average woman gets her period from 38 to 40 years (or 456 periods).

1 tampon every 6 hours = 4 tampons per day x 5 days of a period = 20 tampons per cycle x 456 periods = 9,120 tampons. At 36 tampons per box, that’s 253.3 boxes x $7 = $1,773.33

Now, I switched to Thinx – period underwear. I’ve 3 pairs. During the sale, all the 3 combined costs around $70 (other days around $120, still less when compared to the tampons and pads).

Now let’s keep the highest $120 (comes for 5 years) x 8 = $960 for the entire lifetime!

Period Underwear Thinx is good for the environment:

As you can see the number of period products we use and the number of years that takes to decompose those disposable pads and tampons, we can definitely say that Period Underwear is GREAT for the environment!

Thinx is comfortable: A quick backstory

During my college days (before I got into my zero waste lifestyle), my period doesn’t show up every 28 days. As I’m afraid of stains, I’d just wear the disposable sanitary napkins when the day comes irrespective of whether my actual period shows up or not.

Also, I have had a low flow in the last 2 days. Because of these reasons, I tend to get these napkin rashes but not anymore since I switched to Thinx! 😍

It also results in more waste unnecessarily.

But now I just wear my Thinx as normal underwear if that time of the month comes. So even if the period starts in the mid of the day, I won’t worry about the stains anymore!

They are not only comfortable but also stylish! You won’t feel that you’re on your period, that’s a huge benefit!

A great alternative to Menstrual cups:

Personally what I felt was people around me are ready to take some action for the environment but terrifying when I say about cups (including me). This is the case for teens as well. And so, I tried Thinx and told my fellow girls about my period experience with this period underwear and they’re ready to make a switch. So, I thought to share this with all of you, it may highly benefit the people who are afraid of cups.


My Zero Waste Period Journey – Day 1 to 5 :

For the 1st time in my life, I’m excited to have my period 😅

I just wanna share my zero waste period experience on the very day I get the periods, so that I can share everything like the live updates – how I feel and did I face any stain issues etc…

Note: I tried Thinx for the 1st time when I’m at home as I’m not sure about it. I just want you guys to do the same. You don’t want to cause any leaks or accidents to happen and get disappointed. So, make sure to check your flow and try your Thinx when you’re at home. And see how long it works for you then wear it accordingly!

Day 1:

I’ve medium to heavy flow on the 1st 2 days. So, I wear Super Hiphugger on my 1st day as it holds 2.5 regular pads or 5 regular tampons. I was able to wear it for 8 hours without any leaks or stains.

Period Underwear - Thinx

Thinx: Super Hiphugger

Of course, it differs from one person to another. If your flow is heavier than mine,  you can wear up to 6 hours or something, if it’s low, you can wear them for 12 hours.

And at the night, I changed into my Sleep-Shorts and went to sleep.

The sleep shorts from Thinx are the best when comes to heavy flow. I use this especially on my period nights and 2nd day as it holds a lot! Similar to Super Hiphugger, it holds 2.5 regular pads or 5 regular tampons.

Period Underwear - Thinx

Thinx: Sleep Shorts

Day 2:

I was really excited to check my bedsheets in the morning and I was damn happy to see no stains on my clothes or Bedsheets. This is awesome! I rarely pass this because I always stain my sheets on my 1st and 2nd day and I can’t express enough about those stressful mornings.

When I see the stains in the morning, I’ll be irritated because I’m already tired but then I’ve to wash these… And I can’t even imagine the days when I stay at someone’s (relative’s or friend’s) place during my periods. On those days, I use 2 napkins for the stain-free night but that’s very uncomfortable to sleep.

And now back to the present…

In order to check its capacity, I tried it for 18 hours (from Day 1 night to this noon) and the results turned out really well. And yeah it does hold a lottttt!

Also, I don’t feel that wetness or any irritations that I usually have during my periods.

Day 3, Day 4 & Day 5:

Very low flow in the last 3 days and I just go for my Sport. It holds 1.5 regular pads or 3 regular tampons. Mostly I wear it for 24 hours. But it’s totally up to you to change every 6 to 8 hours.

Period Underwear - Thinx

Thinx: Sport

So, I just interchange these 3 and use them for my entire period. I just love Thinx and my 4th Thinx pair is on my way (while writing this post).

As I mentioned earlier, I feel really comfortable because it just feels like normal underwear. I just can’t express how comfortable I am!

I wanna say one thing, not many girls are aware of this but feel free to share it with your friends about Thinx and if you’ve any doubts, please don’t hesitate to ask me any queries to me in the comment section below. I’m always here to help you guys!

I just want you guys to experience a great period as I did!

Yeah, I know we have a stomach ache, leg pain, and feeling exhausted on our period but at least we can have a comfortable period by not going for pads/ napkins.

As I always used to say, it should not only creates a great experience for us but also saves the environment and our World from these landfills!

Thinx models:

The absorbency level in each Thinx pair/model differs from one another. So, in order to make your life easier, I’m sharing all their models with their absorbency levels below.

Thinx – Type

Regular Pad



 Menstrual Cup

Super Hiphugger

 2.5  5  7.5  1.5
Hiphugger  1.5  3  4.5  0.9

Sleep Shorts

2.5  5  7.5  1.5

Super Cotton Brief

 2.5  5  7.5  1.5


 1.5  3  4.5  0.9

Super Hi-Waist

 2.5  5  7.5  1.5


 2  4  6  1.2


 1.5  3  4.5  0.9

Cotton Brief

 2  4  6  1.2

Cotton Bikini

 1.5  3  4.5  0.9


 0.5  1  1.5  0.3

French Cut

2  4  6  1.2

Note: I took these from the Thinx official website.

Thinx – Buying tips: 

Make sure to read these before you buy your Thinx:

  • Check out all the models and see each absorbency and buy accordingly. Some only hold 1 pad and some hold more. So, please ensure this before buying. For easy reference, you can look at the table above.
  • Before buying your Thinx, make sure to check the size chart. You can able to see the chart below for every underwear on their website.
  • If you’re still afraid to make the switch, don’t worry, Thinx has a 60-day trial plus free returns. But you’ll definitely not return them as you’d just love them as I do!
  • And make sure to buy at least 3 sets of Thinx, that way you can have enough to change.
  • I use 2 per day, you can make your calculations and buy accordingly.

Thinx Discount & Offers:

I’ve noticed that many people are ready to make the switch to Thinx but they were hesitant to do because of its price.

Even though it costs a lot, it saves a lot of money in the long run! You can refer to the calculations above!

But if you are still hesitant to buy, there’s good news for all of you, guys!

If you’re interested to invest in Thinx, do it now to get 20% off! Check out the discount here!

Frequently Asked Questions – Thinx (FAQ): 

How to wash it? And how to maintain the Thinx for a longer life?

  • I wash them 1st in the running water till I see clear water. And yeah while washing you’ll see the slight color change in the water. (BTW, that’s not that gross. Imagine taking your used napkins by the garbage pickers. After all, it’s yours)
  • Once you see the clean water, I hand wash them with regular washing soap or liquid as it preserves the elasticity. You can also add your Thinx to your regular laundry (delicate cycle) in this step. You shouldn’t put them in the dryer. Just treat your Thinx like you would to any other delicates (your regular undies or bras).
  • Hang dry it in the sunlight or in the shade (if the weather is too hot).

Don’t do the following:

  • Ironing
  • Bleach or use fabric softener
  • Washing in Hot water

Does Thinx really work? 

Yes, they do. You now know that they work from my experience.

Does Thinx smell?

No, they don’t.

Their website says the wicking layer of our signature period-absorbing technology has an application of non-migratory silver, commonly used in performance wear and medical devices to control odor and the spread of bacteria. “Non-migratory” means it won’t come off your undies and that it only responds to bacteria *on the fabric*, not on your skin (so your vaginal microbiome stays fresh and balanced!)

How long does a pair of Thinx last?

When maintained properly, it lasts from 2 to 5 years!

How long can I wear Thinx? (or) Can you wear Thinx all day? (or) How many hours can you wear period underwear?

I’m not sure about the other period underwear as I’ve not used them. So, I’ll just share about Thinx. I wear them for 24 hours on my last 3 days. In the 1st 2 days. I’ll change it every 8 hours.

Is Thinx safe to use? (or) Is Thinx hygienic? (or) Are period undies healthy?

Yes, Thinx is safe to use. You can learn more about it here.

Can you sleep in Thinx?

Yes, Personally, I wear Sleep-Shorts and Super Hiphugger during my period nights!

Is Thinx – Period Underwear good for heavy periods?

Yes, they are. But for some people, additional support like menstrual cups may be required.

Also, in these cases, don’t combine Thinx with a pad. Instead try to wear it with a cup or wear 2 pairs, like sports and sleep-shorts.

What happens if you put Thinx in the dryer?

Their website says a few cycles in the dryer won’t hurt your Thinx. However, repeated exposure can reduce the performance of the underwear, so try not to make a habit of it!

Why are period pants so expensive?

They are designed for longer use. As I mentioned earlier, when you look at them in the long run, they aren’t expensive. They are cheaper when compared to your disposable period products.

Are Thinx true to size?

Yes, mine fits perfectly! Before buying your Thinx, make sure to check their size chart and buy accordingly.

How many pairs of Thinx do you need?

You’ll need a minimum of 3 Thinx – period underwear!

Can I wear Thinx as a swimsuit?


Can teens use Thinx?

Yes, they can. In fact, teens have a separate category as Thinx (BTWN). Do check them out at the bottom of the page!

Materials used in the Thinx (or) what Thinx made of?

Every pair of Thinx is made with innovative technology for the ultimate period protection. Their breathable products are safely made with cotton, nylon, and elastane (for a little stretch!)

Thinx has 3 layers to protect you from leakage:

  1. Moisture-wicking layer – Draws away wetness and neutralizes smells
  2. Absorbent layer – Captures fluid in the gusset for all-day dryness
  3. Moisture-impermeable layer – Prevents leaks and stays breathable

The 1st 2 layers are made of cotton and elastane (which is used in swimwear) and the 3rd layer is made of polyester.

To know more about their product, click here.

How do I know if they’re getting full?

You’ll feel the wetness in your Thinx. From that, you can say that your Thinx is full and it’s time to change. When you use them for a cycle or two, you’ll get an idea for sure!

Final thoughts:

I’d definitely keep buying Thinx in the future and I’d never turn to the disposable period products again.

Many people thanked me for sharing about Thinx, I’m humbled 😍

They’re not just looking for comfort in their period but also have the intention to do their part for mother earth 🌎💚 I’m filled with joy. You just made my day! So, I wanna say thank you to all of you guys for making the change!


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