Knix reviews and discussion

3.8

78% of reviewers would recommend to a friend

Reviews mention

  • Reliable leakproof performance underwear
  • Soft, seamless fabric comfort
  • Multiple styles, absorbency options
  • Durable, well-constructed materials
  • Inconsistent, confusing product sizing
  • Tight, uncomfortable waist elastic
  • Limited bra support for larger busts
  • Less breathable, warmer fabrics

Knix earns strong reviews for leakproof underwear that reliably prevents leaks, feels soft and seamless, and comes in multiple styles and absorbencies, but opinions on bras are mixed to poor, with frequent complaints about support and fit. Reviews also flag sizing inconsistency, tight waistbands and less-breathable fabrics, occasional coverage issues, and some users find washing and integration into routines cumbersome—useful to know if deciding between period underwear and traditional options.

AI summary based on Thingtesting reviews

56 reviews and posts

  • I always recommend Knix period underwear to friends so that they can have a zero-waste period. I have their super absorbent and medium absorbent underwear and they help get me through my period.

    Feedback

    The pad on the underwear should extend further back since I find that the absorbent part of the pad is not long enough

  • I like that they are somewhat size inclusive but found the products didn’t work well for me. Products break down in the wash, and seams separate. I have a large chest, and have a hard time finding a bra. I got a few from Knix and after some sizing back and forth found my size. They were amazing about returns. I found the bras somewhat comfortable but still wanted to take it off by the end of the day. I found them to become less supportive over time, and still dig in in certain places. The straps also can pop off due to strap design. The material of the underwear feels nice but doesn’t breath well.

    Feedback

    Still worth a try if you’re looking for comfortable items, but can’t speak to the longevity.

  • I really like these for underwear to use on my period. I have it in black and they're really comfy and effective.

  • I was pleasantly surprised by the underwear I purchased from Knix. I bought them from KT (their teen line), but I think the quality is the same as long as you size up a bit. They're a good replacement for pads, but I would be mindful of their capacity. Also, they're not reusable since you should wash them right away- it's a bit impressive/scary how much blood they hold.

  • These are my absolute favourite brand of period underwear. Every pair I own is so soft, comfortable, and well-fitting. The cuts and colours change a lot so it’s fun to check out their new products. Make sure to shop during their sales, the deals are always great.

  • I tried it on a whim and bought on a flash sale. I liked the design and look of the product but for me once I received it the product fit nicely but did not love wearing it. The style bikini style underwear I bought through out the day would not stay up. I tried wearing at different weight over a year and never worked for me. Maybe if I got the thing or high waist I would have had a different experience.

    Feedback

    Because the underwear would stretch and was so thin which was great for comfortability and less panty lines I wonder if adding a few dots of silicon around waist for instance would have helped. I remember one day in the fall when It was cool wearing a dress and was walking and my underwear started sliding down that I actually had to hold them up so that they wouldn’t end up at my ankles 😐 but In the summer same under wear when it was hot the moisture of the heat helped them stay on.

  • I saw the commercials about these so I bought a pair just to see how true the commercials are. What a lie I wore one for an hour and I had a mess. Why sell something like this and lie about it so you can make money off from people. I will let other people know about your so called period underwater.

  • The fitting is not right with the products I bought. They said that most items fit small and to go up a size. I bought the high waisted super absorbancy briefs in medium as I am usually a small. I am SWIMMING in them. They are like 2 inches above my belly button! The other pair I got was the super absorbaancy thong. I also got these on medium. They are super tight, digging into me. The padding also makes no sense as it goes to my stomach, and you cannot wear with leggings as you can see the padding. I also bought the disposable pads. They are huge and loose. Don't stay in position. Pretty disappointed considering how much I spent.

  • I ordered the boy shorts. Size doesn't matter at this point. I know now I should have never taken them out of the stinkin package, but I had to in order to look at it. The material it is made of is horrible. Felt like plastic and cheap. Was given a store credit instead of my money back. Not at all happy with this company. Will not order from them again.

  • I own the revolution bra, luxe pullover bra and the luxe lift body suit. I love them all! The pullover is my favourite and feels like I don’t even have a bra on. So comfortable I made another order right away!

    Feedback

    Follow the size chart! It can feel a bit snug at first but loosens up to be super comfortable

  • Tried a bra and underwear. Didn't like either. They don't allow you to return unopened underwear so only buy ONE pair when you first try them. To me, that's very poor customer service. I can understand not returning opened packaging, but not unopened. Material is very weird feeling on both bras and undies. Very slick and doesn't feel good on skin. I won't be buying anything else from them.

  • Extremely comfortable, but no support. I was very disappointed. If you have medium to large saggy breasts, like I do, there is no support for you with this product.

  • I got the postpartum tank tops. They’re livesaving for breastfeeding moms. I got 3 of them at first then bought 2 more. I lived in it for about 2 years, they’re soft and so comfy. The quality is incredible. I suggest to every breastfeeding mom to get some!

  • These are very good period panties. I used them up until I had a hysterectomy. The reusable pads were nice for those extra heavy days. Great for young girls, too.

    Feedback

    The customer service was not very good years ago. I had an issue with not receiving some of my reusable pads and trying to get that solved was impossible. So I hope that has changed.

  • These are amazing and make life so much easier.

    Feedback

    I’m not sure there’s anything to change. I love these.