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🩸 Leakproof luxury meets sustainable style—period protection redefined.
KNIX Super Leakproof Boyshorts are high-performance period panties designed with patented leakproof technology that absorbs up to 8 teaspoons of liquid. Featuring a 9-inch extended gusset for superior coverage, these breathable, quick-dry boyshorts combine comfort and sustainability. Made from a moisture-wicking, anti-odor fabric blend, they are machine washable and reusable, offering an eco-friendly alternative to disposable menstrual products. Perfect for moderate to heavy flow, they provide discreet, durable protection with a fit that adapts over time.













| ASIN | B0BHKN6GK6 |
| Additional Features | Elastic Band |
| Age Range Description | Adult |
| Apparel Fabric Stretch | Medium Stretch |
| Apparel Fabric Weight Class | Lightweight |
| Best Sellers Rank | #128,072 in Health & Household ( See Top 100 in Health & Household ) #58 in Women's Period Panties #581 in Incontinence Protective Briefs & Underwear |
| Bottom Style | Boy Shorts |
| Brand Name | KNIX |
| Care instructions | Machine Wash |
| Color | Black |
| Customer Reviews | 4.1 out of 5 stars 210 Reviews |
| Fabric Type | Main Body 70% Nylon 30% Spandex Gusset Top Layer (Moisture Wicking + Anti-Odor): 84% Modal, 8% seaweed, 8% spandex Gusset 2nd Layer (Absorbent Fabric): 100% Polyester Gusset 3rd Layer Fresh Fix Technology Gusset 4th Layer (Waterproof Membrane): Polyurethane Film |
| Fabric type | Main Body 70% Nylon 30% Spandex Gusset Top Layer (Moisture Wicking + Anti-Odor): 84% Modal, 8% seaweed, 8% spandex Gusset 2nd Layer (Absorbent Fabric): 100% Polyester Gusset 3rd Layer Fresh Fix Technology Gusset 4th Layer (Waterproof Membrane): Polyurethane Film |
| Fit Type | Regular |
| Fit to Size Sentiment | Positive |
| Import Designation | Imported |
| Item Type Name | Boy Short Panties |
| Item Weight | 5.6 ounces |
| Manufacturer | Knix |
| Manufacturer Part Number | FK202BM-3PK |
| Material Type | Polyester Blend |
| Number of Items | 3 |
| Origin | Imported |
| Pattern | Solid |
| Product Care Instructions | Machine Wash |
| Rise Style | High |
| Size | Medium |
| Style Name | Boyshort |
| Style Number | FK202 |
| Subject Character | Sexy |
| Theme | Solid Color |
| UPC | 628199130003 |
| Unit Count | 3 Count |
C**Y
Great alternative to pads
Super comfy, not too thick! They fit perfectly and cover like my usual underwear does. I haven’t leaked yet and I have a moderate to heavy flow on average. No shrinking in the wash’s and the discharge washes right out, no lingering smell or stains that I can spot!
M**N
Work great
These were great. No leaks, comfortable ,durable stretchy. I was always scared of TSS with other feminine products. I’m so glad they made these.
A**O
Super comfy
Really comfortable and reliable underwear for periods. They fit well and don’t show under clothes. The leak protection works great, and I like that they’re washable and reusable. The only downside is they can feel a bit bulky sometimes, but overall a great product!
R**L
Actually work!
I think this needs to go on a list of the best inventions of all time. This just took so much annoyance out of being on your cycle. I was sleep the whole night with no problems. I just can’t believe how much easier this is. This sounds overly dramatic, but I feel so happy for this new generation of girls that gets to use this type of product instead of having to rush to the bathroom during passing periods, or being worried about their clothes getting ruined, or just all the different embarrassing things that happened to you at school or in life because of your period!
E**R
Not leak proof!
These are comfy but the part that actually absorbs liquid doesn't cover enough area. Can easily leak out the back and sides. The whole reason I bought these was for peace of mind overnight on my heavy days and these just don't do the job.
T**.
Worth the money
I wish I would’ve known about these years ago because they work well. My skin gets irritated from wearing a pad and having pcos means for me that my period last longer than most so these are great for giving my skin a break. They also work well if you have for light bladder leaks. The only thing I would change is I wish the protective coverage would go higher in the rear. They do take a little more care to clean and are pricey but well worth it and it saves on buying so many pads. Also if you wear tampons these would be great for a little extra protection.
E**E
Good Quality for lighter flows
I really wanted to love these, but they didn't fit my needs. The quality is great. They're very comfy and look nice. But they aren't designed for those of us with very heavy flows. Although they absorb well enough, there is risk of leaking on heavy flow days. This is because of the too-narrow crotch. I'm a tinier build than average and I still find the crotch too narrow. It would be fine if these were regular underwear and not during periods, but not for period underwear. I definitely had an embarrassing day that I had to leave work early because of leaking. That said, these are great for very light period days, spotting, and for those with concerns about awkward moments of mild incontinence. I still wear them, especially on those days when I'd like a little protection just in case my period starts earlier than anticipated. But definitely not for my medium and heavy flow days!
A**R
Kept me dry after water broke!
They fit as expected and boy are they absorbent. I can't attest to these as period panties just yet because I bought these while pregnant and my cycle still hasn't returned, but I trust them to be there for me when I do because they definitely proved their worth after my water broke! Obviously they couldn't take *all* of that fluid, but they at least got me to the hospital and through check in.
K**E
Truly leak proof
Unbelievable. Just wore these at 11 months postpartum on my heaviest flow day with not a single leak. If you’re debating going cheaper with a brand like Innersy, don’t. I did. I will never go back. Knix it is.
M**R
The best reusable non stinking period underwear underwear and sexy!
The best reusable non stinking period underwear underwear and sexy! Invest in yourself! My husband didn't even know I was on my peorid because I wasn't wearing my older cotton granny panties thick heavy observing undies that smell. This lasts me all day without needing to change! Totally worth the price!
P**H
Great idea.
The fit is perfect.HOPE THEY do as claimed.Have not worn them yet but as a senior when moments needed I think will be right choice.they are great material.
M**!
Ok but they don't breath
The material the actual underwear is made out of doesn't breath! Makes my bikini line area sweat. Fits to size. Does a good job of taking in blood. Unfortunately bc if the sweating thing i have to return.
C**J
Quality not great
Seams coming apart just after a few wears
Trustpilot
1 month ago
2 months ago