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Home / Bras / FreeFlex™ Demi Bra
Best Seller

FreeFlex™ Demi Bra

$78.00 CAD

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

| Warm Sand
| Warm Sand
Sofia is wearing a 32D | Warm Sand

Sofia is wearing a 32D

| General
| General
| General
| General
Sofia is wearing a 32D | Warm Sand

Sofia is wearing a 32D

Color: Warm Sand

Size:

True to Size

•

Size:

Knix Size

Size and Fit Guide

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Shipping

HOLIDAY SHIPPING

Give the gift of Knix! To receive your order by Dec 24th, please order by the following dates.

Toronto, Ottawa, Montreal, Winnipeg, Regina, Calgary, Edmonton, Vancouver
Standard & Expedited: Monday, December 22

Urban Centres (excluding the above)
Standard: Wednesday, December 17
Express: Sunday, December 21

Rest of Canada
Standard: Sun, December 14*
Express: Thu, December 18*
*YK, NWT, NT, NL, and remote areas across Canada.

For locations serviced solely by Canada Post, please allow at least 5 additional days due to rotating strikes. This applies to P.O Box and RR addresses.

To avoid any additional delays during the rotating strikes, we will use alternate carriers when possible.

Please note: Weather conditions and carrier issues may cause delays. Delivery dates are not guaranteed.

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.

Delivery Time
For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines vary depending on location and do not include processing times.

Shipping Charges
Orders over $100* CAD = Free Shipping (2-6 business days)
Orders under $100* CAD = $12 CAD Shipping (1-3 business days)
Orders delivering to NWT, Nunavut and Yukon are subject to $20 delivery fee.
*After discounts, before shipping and taxes.
Easy Returns within 30 Days

Returns

Returns

Free Returns

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.

Sale & Last Call

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

| Warm Sand
| Warm Sand
Sofia is wearing a 32D | Warm Sand
| General
| General
| General
| General
Sofia is wearing a 32D | Warm Sand

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

Lightly lifts and separates

Lightly lifts and separates

Uplift Push Up Bra
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.

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Shop All Arrow Right

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Revolution Adjustable Pullover Bra

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3.9
Rated 3.9 out of 5 stars
Based on 419 reviews
Total 5 star reviews: 216 Total 4 star reviews: 67 Total 3 star reviews: 48 Total 2 star reviews: 45 Total 1 star reviews: 43
69%would recommend these products
ComfortRated 4.0 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
Write a Review (Opens in a new window)
419 reviews
  • Rated 3 out of 5 stars
    Yesterday
    Squeaks and uncomfortable.

    While this bra has good side coverage and felt okay in store I, unfortunately, find it uncomfortable to wear for more than an hour or so. It’s mainly uncomfortable at the back clasp so I stopped wearing it. I am disappointed after spending so much. I am not sure what the problem is, maybe the nature of the fabric? :-(

    Also, a non-metallic underwire seemed like a good idea but I find it noisy (sort of squeaky).

    Tammy S.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    3 days ago
    3 Stars

    Uncomfortable and “squeeks” when worn :(

    Michelle
    Was this helpful?
  • Rated 1 out of 5 stars
    5 days ago
    Not great at all! Believe the reviews!

    Knix do a lot of things well, but this is not one of those things… the flex wires don’t sit right on the rib cage, it gives the bra a horrible shape. And the noise!!! Believe it, it’s real. Not good. Just don’t get it. Get their other bras.

    Elisabeth O.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    5 Stars

    Super comfortable! I am very picky when it comes to my Bras and this one has been on my list to try for some time. I am glad I jump on their black Friday sale because now I have a new favorite! It's seriously the only comfortable bra I own. I will buy again

    Molly
    Was this helpful?
  • Rated 1 out of 5 stars
    1 week ago
    Terrible fit

    I’m attaching a photo of the 2 bras I bought during the Black Friday sale…both 34E (my usual size) & it’s hard to believe they are supposed to be the same size! The cups of the FreeFlex Demi bra are MUCH larger than the Revolution V-neck, it’s way too big & Im not even going to remove the tags…I’m going to donate it to a charity. It also honestly didn’t feel any different than regular wired bras. The cups of the Revolution are smaller than regular department store 34E’s & my boobs spill over the top giving that awful double boob look. It may stretch with wash & wear so I’ll persevere for a little while. I have to say I have now bought multiples of almost every kind of bra Knix sells (I get suckered in by their sales) & none of them fit properly even though I’ve measured myself & ordered what should be the right size. I keep thinking the next one will fit correctly & it doesn’t! I own loads of Knix panties and they are all terrific quality & a good fit so my advice is to stick with those. I’ll be buying my bras from now on in a department store where I can try them on & not have to break them in before they stretch enough to fit your body…I’ve wasted too much money already!

    June F.
    Verified Buyer
    Was this helpful?
  • Rated 1 out of 5 stars
    1 week ago
    itchy

    the hooks were uncomfortable in the back and made me uncomfortable all day. Which is worst poor fitting in the front or poor fitting in the back?

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

    Surprised how comfortable the bra is. Bought one, liked it so much bought 2 more.

    Chris S.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    1 week ago
    fits on the small side

    The straps are too short and the band is 1/2 smaller than other bras of the same size. Have to wear the straps fully extended and the band on the last hook.

    Doris B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Fits great!

    The Demi Bra works well for me. It is soft, comfortable, and flattering. I used the Knix size guide and the fit is just right.

    Elizabeth J. N.
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    1 week ago
    Hard to rate because it's slightly large

    There's a gap in the armpit, but I think i may have dropped a half cup size recently.

    It's otherwise high quality and gives a lot of support. I'm not real fond of the padding, but that's on me because i still ordered a padded bra. I think if you like the characteristics of this bra, this will delight you. But it's not a game changer if you typically don't like wire or padding.

    Lydia S. P.
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    1 week ago
    comfortable and substantial

    I really like this bra and did not give it five stars because it tends to have alot of fabric which bunches under my arms. Not overly bothersome but annoying. Like the colours and that it does not dig into my skin under my breasts. I would encourage people to give this one a try; gives great support. The girls are happy in this bra.

    Lorraine Q.
    Verified Buyer
    Was this helpful?
  • Rated 1 out of 5 stars
    1 week ago
    1 Star

    Bad design, too much flex in the underwire. Fits poorly.

    Madisen
    Was this helpful?