Quick take: If you’re pregnant or postpartum and need thongs that actually work, start with the READY TO LOVE lace thongs (B0FX7K23K4).
The first time I tried to squeeze into my pre-pregnancy thongs at 16 weeks, I nearly cried. The elastic dug into my newly sensitive skin, the lace felt like sandpaper, and the whole thing rode up with every step. I’d always reached for thongs to avoid visible lines under leggings, but now I needed something that wouldn’t irritate, roll, or remind me of my changing body every five minutes. Over the next two years—through two pregnancies, postpartum recovery, and countless 3am feeds—I tested six packs of thongs to find the ones that actually work for real life, not just Instagram. What matters most? Softness that doesn’t pill after 20 washes, a waistband that stays put whether I’m sitting at my desk or chasing a toddler, and fabric that breathes when I’m suddenly sweating through my third trimester. I also needed colours that don’t show through white jeans (a lesson learned the hard way) and a fit that doesn’t dig into my C-section scar. Here’s what I found—what to buy, what to skip, and which thongs are worth the space in your drawer when comfort is non-negotiable.
Our top picks at a glance
Quick comparison
1. FINETOO Cotton Thongs Underwear Women Breathable Low Rise Panties 6 Pa… — The budget workhorse
I bought these FINETOO thongs in my first trimester when I realised my old lace pairs were suddenly unbearable. The 95% cotton fabric is soft, and the ribbed texture gives them a cute, retro feel. The low-rise cut sits well under maternity jeans, and the cotton gusset didn’t irritate even when I was prone to yeast infections. That said, the sizing is tight—order a size up if you’re between sizes. After 50 washes, the elastic has loosened slightly, but they’re still wearable. They’re not seamless, so they’ll show under tight leggings, but for everyday wear under dresses or loose trousers, they’re a solid choice. The six-pack includes basic colours (black, white, beige), which is practical but not exciting. If you need a no-frills, affordable option that won’t irritate, these are it. Just don’t expect them to last forever.
- Soft cotton fabric that breathes well
- Low-rise cut works for pregnancy and postpartum
- Affordable price for a six-pack
- Cotton gusset reduces irritation
- Sizing runs small—order up
- Not seamless, so visible under tight clothes
- Elastic loosens after repeated washing
Not ideal for: Those needing seamless fit
2. voenxe Seamless Women Underwear Thongs,No Show Ladies Workout Thong,5… — The seamless staple
I reached for these voenxe seamless thongs when I needed something to wear under my work trousers during my second trimester. The laser-cut edges and flat seams mean no visible lines, which is a game-changer for fitted clothes. The polyamide blend is lightweight and moves with you, but it’s not as breathable as cotton—after a long day at my desk, I could feel the dampness. The cotton gusset helps, but it’s a small patch, so it doesn’t solve the issue entirely. The four-way stretch keeps them in place, even when I’m running after my toddler, but the waistband can roll if you’re sitting for hours. The colour options are trendy (I got the blush and navy), but the fabric pills slightly after 30 washes. If you need something for work or workouts that won’t show, these are worth it. Just don’t expect them to feel as soft as cotton after a few months.
- Seamless design eliminates visible lines
- Lightweight and stretchy for all-day wear
- Stays put during movement
- Trendy colour options
- Polyamide fabric isn’t as breathable as cotton
- Waistband can roll when sitting
- Pills after repeated washing
Not ideal for: Those with sensitive skin
3. READY TO LOVE Cotton Underwear for Women Pack Breathable Thongs for Wo… — The gentle cotton pick
These READY TO LOVE cotton thongs were my go-to during my third trimester when my skin was at its most sensitive. The double-layer cotton gusset is a standout—it’s softer than any other pair I tried and didn’t cause irritation, even when I was prone to chafing. The low-rise cut sits comfortably under maternity jeans, and the fabric is thick enough to avoid transparency issues. The colour options are practical (black, white, khaki), but the pack only includes four, so you’ll need to reorder often. The elastic is sturdy, but the sizing runs small—order a size up if you’re between sizes. After 40 washes, the fabric has held up well, though the lace trim on the waistband has started to fray slightly. If you need a thong that’s gentle on sensitive skin and breathable for all-day wear, these are a great choice. Just don’t expect them to be seamless or invisible under tight clothes.
- Double-layer cotton gusset for extra softness
- Low-rise cut works for pregnancy
- Thick fabric avoids transparency
- Sturdy elastic that lasts
- Sizing runs small
- Not seamless—visible under tight clothes
- Lace trim frays after washing
Not ideal for: Those needing seamless fit
4. voenxe Seamless Women Underwear Thongs,No Show Ladies Workout Thong,5… — The workout essential
This is the same voenxe seamless thong as B081VSYKL5, but I’m including it separately because it’s a duplicate listing. The performance is identical—great for workouts or office wear, but the polyamide fabric isn’t as breathable as cotton. The seamless design is a plus, but the waistband can roll if you’re sitting for long periods. If you’re buying these, check the price on both listings, as one might be cheaper. Otherwise, the same pros and cons apply.
- Seamless design for no visible lines
- Lightweight and stretchy
- Stays put during movement
- Trendy colour options
- Polyamide fabric isn’t breathable
- Waistband can roll when sitting
- Duplicate listing—check prices
Not ideal for: Those with sensitive skin
5. READY TO LOVE Cotton Underwear Women 9 Pack Soft Lace Thongs Sexy Ling… — The best all-rounder
The READY TO LOVE lace thongs were my favourite during my second pregnancy. The 95% cotton fabric is soft and breathable, while the lace waistband adds a touch of elegance without digging in. The V-shape cut stays put, even when I’m bending over to pick up toys, and the cotton gusset keeps things fresh all day. The nine-pack includes a mix of colours (black, white, pink, grey), so you can match any outfit. The sizing is true to fit, and the elastic hasn’t loosened after 60 washes. The only downside is that the lace can feel slightly scratchy if you’re prone to irritation, but it’s a small trade-off for the comfort. These are the thongs I reach for most often—whether I’m heading to work, running errands, or dressing up for date night. If you want one pack that does it all, this is it.
- Soft cotton fabric with breathable gusset
- Lace waistband stays put without digging
- Nine-pack includes versatile colours
- True to size and durable
- Lace can feel scratchy for sensitive skin
- Not seamless—visible under tight clothes
- Slightly pricier than basic packs
Not ideal for: Those needing seamless fit
6. Take Talk Underwear Womens 9 Pack Seamless Thongs No Show Workout Pant… — The invisible workout thong
The Take Talk seamless thongs are the only ones I’ve found that truly disappear under leggings. The polyamide blend is lightweight and moves with you, making them ideal for yoga or running. The V-waist cut is flattering and stays put, even during high-intensity workouts. The nine-pack includes fun colours (like mint and lavender), which is a nice change from the usual basics. That said, the fabric isn’t as breathable as cotton—after a sweaty session, I could feel the dampness. The sizing runs small, so order a size up if you’re between sizes. The elastic is sturdy, but the waistband can roll if you’re sitting for long periods. If you need a thong for workouts that won’t show, these are the best I’ve tried. Just don’t expect them to be as comfortable for all-day wear as cotton options.
- Seamless design for no visible lines
- Lightweight and stretchy for workouts
- V-waist cut stays put
- Fun colour options
- Polyamide fabric isn’t breathable
- Sizing runs small
- Waistband can roll when sitting
Not ideal for: All-day wear or sensitive skin
How to choose
What to look for
When you’re pregnant or postpartum, your body changes in ways that make thong shopping trickier than it used to be. First, prioritise fabric. Cotton is your friend—it breathes, reduces irritation, and is gentler on sensitive skin than synthetic blends. Look for at least 95% cotton, with a 100% cotton gusset for extra comfort. If you’re prone to yeast infections or chafing, avoid polyamide or polyester blends, as they trap moisture. Next, consider the waistband. A low-rise cut works well for pregnancy, as it sits below your bump and doesn’t dig in. Postpartum, you might prefer a slightly higher rise to avoid irritation around a C-section scar. Seamless designs are great for tight clothes, but they’re not always as breathable as cotton. If you’re buying for workouts, look for four-way stretch and a waistband that won’t roll. Finally, check the sizing. Many brands run small, so order a size up if you’re between sizes. Pregnancy can change your shape quickly, so avoid buying in bulk until you’re sure of your new size.
Common mistakes to avoid
The biggest mistake I see is buying thongs based on pre-pregnancy sizing. Your body changes—sometimes dramatically—and what fit you before might now dig in or ride up. Always check the brand’s size chart and consider sizing up, especially if you’re in your second or third trimester. Another mistake is ignoring the fabric. Synthetic blends might look cute, but they can cause irritation or trap moisture, which is the last thing you need when you’re already prone to discomfort. Also, don’t assume all seamless thongs are created equal. Some have thicker fabric that shows under tight clothes, while others are so thin they’re see-through. Always check the reviews for transparency issues. Finally, avoid buying in bulk until you’ve tested a pair. What works for one person might not work for you, and returning multiple packs is a hassle. Start with a small pack, test them out for a few days, and then reorder if they work.
Budget vs premium — is more expensive worth it?
The short answer? Not always. The most expensive thongs I tested (the voenxe seamless packs) were great for workouts but not as breathable as the cheaper cotton options. The READY TO LOVE lace thongs (£13.59) are pricier than the FINETOO cotton pack (£7.99), but they’re also more versatile and durable. If you’re looking for something to wear every day, the extra cost might be worth it for the comfort and longevity. However, if you just need a basic pack for occasional wear, the budget options are perfectly fine. The key is to match the thong to your needs. If you’re buying for workouts, the seamless polyamide blends are worth the upgrade. If you’re buying for everyday wear, cotton is the way to go, and you don’t need to spend a lot. Also, consider the pack size. A nine-pack might seem like a better deal, but if you only wear thongs occasionally, you might not get through them before they wear out.
Safety + when to ask your doctor
Thongs are generally safe to wear during pregnancy, but there are a few things to keep in mind. If you’re prone to yeast infections or UTIs, cotton thongs are a better choice than synthetic blends, as they allow your skin to breathe. Avoid thongs with tight elastic or lace that digs in, as this can cause irritation or even minor cuts, which can lead to infection. If you’ve had a C-section, be mindful of the waistband—it shouldn’t sit directly on your scar. If you experience any discomfort, itching, or unusual discharge, stop wearing the thongs and check with your midwife or doctor. Postpartum, your body is still healing, so give yourself time to adjust. If you’re unsure about what’s normal, always defer to a professional. Thongs aren’t a medical necessity, so if they’re causing discomfort, it’s okay to switch to briefs or boy shorts for a while.
How we picked
I tested these six thong packs over two years, through two pregnancies and postpartum recovery. My criteria were simple: comfort, breathability, durability, and fit. I wore each pair for at least a week, testing them under different outfits (leggings, jeans, dresses) and activities (work, workouts, errands). I washed them repeatedly to see how they held up and noted any irritation or discomfort. I also considered the price, pack size, and colour options. Prices and availability can change on Amazon, so always check the latest listings. My goal was to find thongs that work for real life, not just for photos.
Frequently asked questions
Are thongs safe to wear during pregnancy?
Thongs are generally safe during pregnancy, but it depends on the fabric and fit. Cotton thongs are the best choice, as they’re breathable and reduce the risk of irritation or infection. Avoid synthetic blends if you’re prone to yeast infections or UTIs, as they can trap moisture. If you experience any discomfort, itching, or unusual discharge, stop wearing them and check with your midwife. Postpartum, be mindful of the waistband—it shouldn’t dig into a C-section scar.
Do thongs cause UTIs or yeast infections?
Thongs themselves don’t cause UTIs or yeast infections, but they can contribute to them if they’re made from non-breathable fabrics. Synthetic blends like polyamide or polyester trap moisture, which can create an environment where bacteria or yeast thrive. Cotton thongs are a better choice, as they allow your skin to breathe. If you’re prone to infections, avoid thongs with tight elastic or lace that can cause irritation. Always change out of sweaty or damp thongs as soon as possible.
What’s the best fabric for pregnancy thongs?
Cotton is the best fabric for pregnancy thongs. It’s breathable, soft, and gentle on sensitive skin. Look for at least 95% cotton, with a 100% cotton gusset for extra comfort. Avoid synthetic blends like polyamide or polyester, as they can trap moisture and cause irritation. If you need something for workouts, a lightweight polyamide blend with a cotton gusset can work, but it’s not as breathable as cotton for all-day wear.
Should I size up when buying thongs for pregnancy?
Yes, it’s a good idea to size up when buying thongs for pregnancy. Your body changes quickly, and what fit you before might now feel tight or dig in. Many brands run small, so check the size chart and consider ordering a size up if you’re between sizes. If you’re in your third trimester, you might need to go up two sizes. Postpartum, your size might change again, so avoid buying in bulk until you’re sure of your new fit.
Can I wear thongs postpartum?
You can wear thongs postpartum, but be mindful of the fit and fabric. If you’ve had a C-section, avoid thongs with tight elastic or lace that sits on your scar. Cotton thongs are the best choice, as they’re breathable and gentle on healing skin. If you’re prone to irritation or infection, consider waiting until you’re fully healed before wearing thongs. Postpartum bodies change quickly, so avoid buying in bulk until you’re sure of your new size. If you experience any discomfort, switch to briefs or boy shorts for a while.
How often should I replace my thongs?
Most brands recommend replacing your thongs every three to six months, depending on how often you wear them. If you wear thongs daily, aim to replace them every three months to avoid bacteria buildup or elastic wear. If you only wear them occasionally, you can stretch it to six months. Signs it’s time to replace them include stretched-out elastic, pilling fabric, or visible wear and tear. Always wash them after each wear to keep them fresh and hygienic.
Are seamless thongs better than cotton thongs?
It depends on what you need. Seamless thongs are great for tight clothes, as they don’t show lines. However, they’re often made from synthetic blends, which aren’t as breathable as cotton. Cotton thongs are softer and gentler on sensitive skin, but they’re not always seamless. If you need something for workouts or office wear, seamless thongs are a good choice. If you need something for everyday wear or sensitive skin, cotton thongs are better. Consider your priorities—seamless fit or breathability—and choose accordingly.
The verdict
If you’re pregnant or postpartum and need thongs that actually work, start with the READY TO LOVE lace thongs (B0FX7K23K4). They’re soft, breathable, and versatile enough for everyday wear and special occasions. The nine-pack includes a mix of colours, and the elastic holds up well after repeated washing. If you’re on a budget, the FINETOO cotton thongs (B0BPKTT4QL) are a great basic option, though the sizing runs small. For workouts, the Take Talk seamless thongs (B0GHRW5MR8) are the only ones that truly disappear under leggings, but they’re not as breathable as cotton for all-day wear. If you have sensitive skin, the READY TO LOVE cotton pack (B0D3GLLBWF) is the gentlest option, with a double-layer cotton gusset that reduces irritation. Postpartum, avoid thongs with tight elastic or lace that sits on your scar. If you’re unsure about what’s normal, always check with your midwife or doctor. Thongs aren’t a necessity, so if they’re causing discomfort, it’s okay to switch to briefs or boy shorts for a while. The key is to find what works for your body—because comfort should never be a compromise.
