Let me start off my saying that these are great, I love the fact that the protective barrier goes all the way to the back of the underwear, so I don’t have to worry about leakage when I sit down, etc. … It also holds a lot! With that being said, I’m 5’5”, 115 lbs, 26” waist, 33” hips, and am normally an S, but the S was veryyy tight on me. Is it doable? Yes, but it gives me major double butt so they are not something that I’d wear out, only at home. I went back and ordered a medium and they fit much better, so SIZE UP!
Period Undies (3 pack)
Leak-proof, odor-proof period underwear with a built-in absorbent liner — feels like regular underwear, with three-way protection against leaks, odor and stains.
Details
- Built-in absorbent liner — no leaks, no odor, no stains
- Three-way protection: leak, odor and stain protection
- Feels like regular underwear
- Sleek low-rise bikini silhouette with moderate coverage
- Moisture-wicking fabric — stays cool and dry
- Reusable and eco-friendly
- Fabric: 95% cotton, 5% spandex · Crotch: 100% cotton
How to apply
Wear them like regular underwear — no pad or tampon needed. The built-in absorbent liner handles leak, odor and stain protection through the day.
Reusable and easy to clean, so one pack replaces disposables cycle after cycle. Available in sizes S–XL.
Shipping & returns
Ships within 1–2 business days. Free shipping over $30.
Say goodbye to pads and liners.
Period Undies combine a built-in absorbent liner with odor-guard and stain-block technology for worry-free protection that actually feels like regular underwear. Moisture-wicking fabric keeps you cool and dry, and the sleek low-rise fit stays discreet under anything.
Real stories of women who stopped thinking about their bra

“It feels like nothing is there. I forget I have them on.”

“Backless dress, no bra, zero stress. First time in years.”

“Finally a shade that actually matches my skin.”

“Packed two pairs for a week in Mexico. Pool, beach, dinner. Stayed put.”

“Wore them for my wedding. Eight hours, no adjusting.”

“Sweatproof for real. Ran five miles and they did not budge.”
Customer Reviews
Overall rating: 4.2 / 5 from 13 reviews.
They didn’t fit me. I order large (normally I’m medium) and they were way to small and too low rise.
Judah K. 3/5 Verified
The quality of the underwear is great! They seem well made and have good fabric. The only thing that didn't work out was the sizing. I am a women's size 8 and have an average size rear end. I ordered the medium and the leg holes were way too tight. Instead of returning them, I just cut a slit in the fabric so they fit. I use a menstrual cup and would usually wear a panty liner for the heavy days as back-up, but now I wear these period panties instead, and they work great. I hand wash and air dry them so they'll last a long time. I would highly recommend, but order a size up.
Amy V. 4/5 Verified
Too small and no one replied back.
Ashley B. 1/5 Verified
Great underwear with padding going all the way back! My only issue is that I didn’t know it had mesh in the front when I ordered it and this mesh isn’t holding up in the wash. After 2 washes, they all started getting little rips in the mesh that just keep getting bigger.
Faith H. 4/5 Verified
So comfortable and the lining goes all the way back so I don’t have to worry about leaking laying down! Highly recommend this product
Faith H. 5/5 Verified
Gifted this to my sisters because they came in 3 pieces. So far so good. Surprised that it didn't shrink in the dryer! Need more of these! Do you have a discount code?
Haze B. 5/5
OMG I have been trying to find nipppyco for SOOOO LONG!=/ trying this new item just because. HAHA!
Marina M. 5/5
Never thought it would be this comfortable to wear these things but I went on a road trip and (TMI) I'm a heavy bleeder and no leaks, super comfy, and breathable! PLS HAVE MORE COLORS! = )
Yuriko Q. 5/5
I loved this company since NIPPPYCO and with this rebrand and with new products, I'm your #1 supporter!
Rebecka A. 5/5
I would give it 5 stars BUT shipping took like 3 days!!! I still like it coz unlike ay others, it's a sexy period undie with 3 pieces for a decent $
Biljana T. 4/5
Loving this new product. Better deals than Amazon ones! I like how it has a lacey part on both sides and 3 PIECES?! Def buying agaiN!
Samantha P. 5/5
Seriously a game freakin' changer! A+++
Alana U. 5/5