FreeFlex™ Demi Bra
10% off Bra & Underwear Sets
FreeFlex™ Demi Bra
10% off Bra & Underwear Sets
Forget what you know about underwire bras. The FreeFlex™ is about to change everything.
Made with an innovative, carbonized flexible wire and wear-tested for more than 625 hours, our newest innovation provides unparalleled lift, separation and support. It’s everything you want from an underwire bra, without the pain of one.
• Lightly molded demi cups lift and separate, providing great shape that looks amazing under lower necklines and t-shirts
• A carbonized wire moves as your body moves for a comfort-first feeling
🇺🇸 Free standard shipping over $100*.
Free expedited shipping over $150*. Duty-free. (after discounts, before shipping + taxes)
All Knix bras are eligible for return or exchange within 30 days of delivery. We want to make sure you can give your new Knix products time to mold to your shape and get comfortable. For sale items with a 20% or more discount you may exchange for another item or store credit.
Your questions, answered.
We offer innovative, wireless and wired bras that give you comfort, support, and lift (you know, the good stuff.) We’ve got styles for every occasion and every outfit: scoop bras, v-necks, pullovers, lightly-molded cups, demi cups, high impact sports bras, front closure bras, and more.
Glad you asked. Finding the right style for your shape and size is key to a comfy bra. Whether you’re looking for an everyday bra with extra side support or a high-impact sports bra, we can help. Take our style quiz to find the perfect bra for whatever occasion, fit, or style you’re looking for, be sure to check it out here.
We always suggest basing your Knix size right off your measurements in inches. You can find instructions on how to measure, plus our bra size calculator here.
In a Virtual Fitting, one of our Knixperts will connect with you via video chat to help you find the perfect fit in any of our items—bras included.
They’ll double check your measurements to figure out your size, show you styles that could work for you, and answer any of your questions. They’ll also assist with exchanges/returns.
P.S. Keep your camera on or off. Our Knixperts are good either way!
- Tara E.Verified Buyer3 hours agoRated 5 out of 5 starsLove Knix!
Quality is amazing. I wasn't sure of the fit at first as there seemed to be extra material in the under arm area but after a wash and wear it seems to be better. Very comfortable for an underwire! Ordered two.
ComfortRated 4.0 on a scale of 1 to 5Poor ExcellentFitRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeSupportRated 5.0 on a scale of 1 to 5Low HighWas this helpful? - LauraVerified Reviewer7 hours agoRated 5 out of 5 starsKnix does wires…RIGHT!
Great bra! I’m used to wearing wireless bras (Knix of course), so comfort is key! This bra gives the comfort I’m used to but with the shape of a wired bra. Recommended addition to your bra collection!
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentFitRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeSupportRated 4.0 on a scale of 1 to 5Low HighWas this helpful? - Rachael M.Verified Buyer19 hours agoRated 5 out of 5 starsBack to Underwires and Loving It!
It’s been a long time since I’ve worn an underwire bra (thanks to Knix), but I thought I’d give it a try. This bra fits great, is super soft and comfortable, and offers great support and separation (for those of us who hate the uniboob feeling). I would definitely recommend as an addition to your wardrobe basics! Thanks Knox for another great bra!
ComfortRated 4.0 on a scale of 1 to 5Poor ExcellentFitRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeSupportRated 3.0 on a scale of 1 to 5Low HighWas this helpful?