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Home / Bras / FreeFlex™ Demi Bra
Best Seller

FreeFlex™ Demi Bra

$68.00 USD

10% off Bra & Underwear Sets*
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Our first underwire bra

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Comfortable, flexible wire

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Lifts and separates

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Lightly lined molded cups

| Black with White Polka Dot
| Black with White Polka Dot
| Black with White Polka Dot
| General
| General
| General
| General
| Black with White Polka Dot

Color: Black with White Polka Dot Limited Edition

Size:

True to Size

•

Size:

Knix Size

Size and Fit Guide

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Shipping

Processing Timelines

Please allow 1-2 business days for our warehouse team to pack and ship your order. During peak periods such as sales, holidays and product launches, please allow up to 4 business days for us to process your order. Once an order is placed, we cannot guarantee any address updates, order changes or cancellations. Orders placed on Friday after 1PM will not be shipped until the following Monday.


Split Shipments

Most orders will ship from a single warehouse. However, we occasionally ship from a combination of warehouse locations, so you may receive your order in multiple parts. If items from your order ship in separate packages, we’ll send you tracking information for each package when it becomes available.

Delivery Timelines

For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines do not include processing times. See above for details. All transit times are measured in business days which are Monday-Friday, excluding holidays.

Please note, all shipping timelines are estimates and are not guaranteed.

We are not able to ship to US territories (including Puerto Rico, U.S. Virgin Islands, Guam, Northern Mariana Islands and American Samoa) at this time.
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Sale & Last Call

Items discounted 30% and below are eligible for size exchange or store credit. Items discounted above 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.

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Knix covers the return shipping fees for exchanges and refunds initiated through our Return & Exchange Portal. Exchange orders initiated through our Return & Exchange portal are also eligible for free shipping within the USA and Canada. Please note, the shipping fees on your original order are non-refundable.

Return Policy

Return policy varies by product, please check if your item is refund or exchange eligible by viewing our full policy here.
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The Underwire Bra Reinvented

Wear tested for over 625 hours, providing unparalleled lift, separation, and support.

All Day Comfort

It's everything you want from an underwire bra without the downfalls of one.

Feels Made For You

Lightly lined, moulded demi cups lift and separate for a great shape that looks amazing under lower necklines and T-shirts. Adjustable straps create the perfect fit.

Smooth Coverage

The ultimate t-shirt bra that appears invisible under clothes.

Zoom

| Black with White Polka Dot
| Black with White Polka Dot
| Black with White Polka Dot
| General
| General
| General
| General
| Black with White Polka Dot

How to Choose?

Essential

Drop
Drop
Drop
Drop
Drop
  • • Everyday Wear
  • • No leakproof protection
  • tsp
    0 tsp

Heavy

Drop
Drop
Drop
Drop
Drop
  • • heavy period days
  • • overnight protection
  • • light bladder leaks
  • tsp
    about 8-14 tsp
  • pad
    about 1.5-3 regular pads
  • tampon
    about 4-7 super tampons
  • cup
    about 1.5-3 menstrual cups

Light

Drop
Drop
Drop
Drop
Drop
  • • light period days
  • • sweat
  • • discharge
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

Drop
Drop
Drop
Drop
Drop
  • • moderate period days
  • • light bladder leaks
  • • sweat
  • tsp
    about 4-8 tsp
  • pad
    about 1-1.5 regular pads
  • tampon
    about 2-4 super tampons
  • cup
    about 0.5-3 menstrual cups

Ultra

Drop
Drop
Drop
Drop
Drop
  • • extra heavy period days
  • • overnight protection
  • • light bladder leaks
  • tsp
    about 15-20 tsp
  • pad
    about 1.5-2.5 super pads
  • tampon
    about 7-11 super tampons
  • cup
    about 2-3 menstrual cups

How it Compares

WingWoman Contour Bra
Wireless support

Wireless support

Extra side and back coverage

Extra side and back coverage

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Wireless boost

Wireless boost

Foam panel creates natural lift

Foam panel creates natural lift

All-day comfort

All-day comfort

FreeFlex™ Demi Bra
Comfortable, flexible underwire

Comfortable, flexible underwire

Lightly lined cups

Lightly lined cups

Lifts and separates

Lifts and separates

Revolution V-Neck Bra
#1 Best-selling bra

#1 Best-selling bra

Deep V Neckline

Deep V Neckline

Wireless Support & Lift

Wireless Support & Lift

FREEFLEX™ TECHNOLOGY

Meet our first wired bra reimagined for optimal comfort and support

Wear tested for more than 625 hours to provide unparalleled lift, separation and support.

Molded Cups

Carbonized Flexible Wire

Innovative carbonized wire flexes and moves with you, delivering the classic structure of an underwire without pinching or digging.

Our Best-Selling Bras

Shop All Arrow Right

Revolution V-Neck Bra

$65.00 USD
10% off Bra & Underwear Sets*

Color: White with Black Polka Dot Limited Edition

WingWoman Contour Bra

$68.00 USD
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Color: Black

Revolution Scoop Bra

$65.00 USD
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Color: Black with White Polka Dot Limited Edition

The One&Only Scoop Bra®

$58.00 USD
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Color: Warm Sand

FreeFlex™ Demi Bra

$68.00 USD
10% off Bra & Underwear Sets*

Color: Black with White Polka Dot Limited Edition

Revolution Adjustable Pullover Bra

$65.00 USD
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Color: White

Revolution Shadow Mesh Bra

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Catalyst Sports Bra

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3.9
Rated 3.9 out of 5 stars
Based on 423 reviews
Total 5 star reviews: 218 Total 4 star reviews: 65 Total 3 star reviews: 49 Total 2 star reviews: 48 Total 1 star reviews: 43
69%would recommend this product
ComfortRated 3.9 on a scale of 1 to 5
FitRated -0.1 on a scale of minus 2 to 2
SupportRated 4.1 on a scale of 1 to 5
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423 reviews
  • Rated 5 out of 5 stars
    2 days ago
    LOVE!

    This is the most comfortable wired bra I've owned. I had high expectations for this Knix product and they didn't disappoint! I will definitely be buying more of these.

    Nicole H.
    Verified Buyer
    Was this helpful?
  • Rated 2 out of 5 stars
    1 week ago
    Imperfect Fit

    I ordered the right size; but there are gaps in the sides of the fabric and the bra makes sounds where the underwire is located. I'm probably going to donate the bra. I ordered a size down and there was no improvement in the fit or sounds the underwire makes.

    DENISE A.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    1 week ago
    Not the Greatest

    I'd say this bra is adequate. It squeaks, like many others have said, and I feel its presence too much on my sides. But it has good shape. Hoping the noise goes away with washing a few times and wearing it in?

    I originally bought my usual size, but it was far too small in the band, so I went by their sizing and it worked.

    Larissa
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Great

    Beige an pd blacj

    Connie C.
    Verified Buyer
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  • Rated 5 out of 5 stars
    1 week ago
    So comfy!

    The Knix version of an underwire bra is the most comfortable. I will definitely get more in different colours. My only wish is they come up with this model in a full coverage bra

    Isabelle D.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    2 weeks ago
    Looks good, sounds funny…

    It’s strange.. whatever is used in the underwire, it squeaks!! Kind of annoying!

    Pamela S.
    Verified Buyer
    Was this helpful?
  • Rated 2 out of 5 stars
    2 weeks ago
    Flex free Demi

    I found the sizing to be a bit off but replaced with the correct size. The fit is nice but the centre area between the cups I find to be quite uncomfortable and really can’t wear it unfortunately.

    Natalie W.
    Verified Buyer
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  • Rated 1 out of 5 stars
    2 weeks ago
    Jk

    Too small

    Jenny K.
    Verified Buyer
    Was this helpful?
  • Rated 2 out of 5 stars
    2 weeks ago
    Free flex - Uncomfortable

    Not impressed with this bra. The flex-wire in the front squeaks really loudly with every movement. Also it leaves lines from all the seams on both front and back of my body, even though it’s not too tight. I don’t recommend this one. (Unfortunately I bought two of these, hind sight would’ve bought another “revolution v-neck”.)

    Laurel P.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    FreeFlex Demi Bra

    Was not a good fit for me, cups larger than expected.

    Michele D.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Love it!

    Love the fit everywhere, the material and that it doesn’t rub. I am so happy that I saw the Knix store and stopped in. I hate ordering bras online because you don’t know how they will fit and I would have never bought a Knix. The sale clerk did a sizing and I came out with 5 bras and ordered a second Free-Flex online since.

    Jennifer L.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    2 weeks ago
    3 Stars

    The bra is ok. I like the feel of the fabric- buttery soft- & the cups aren't too padded, which is nice. However, the shoulder straps slide off my shoulders & the adjustment doesn't stay in place. The band is nice & some what comfortable but something near the hooks on the end did into my back. I think it might just be elastic under the fabric or the corner of the fabric with the seam that is hard & digging into my back. Sadly I'm not thrilled with it because it would be a really nice, comfortable bra if not for that. I wanted to return it but it was a clearance item so i am forced to keep, or i can try reselling on another site.

    Anna
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