All Knix bras (with the exception of the Longevity Bra) are made with bonding technology that creates a comfortable seamless fit and solid support without using an underwire. Most of our wire free bras are made of a nylon and spandex blend.

For the specific fabric content, please refer to the dropdown on the product’s page under “Fabric and Care". Any metal hardware on the bra is nylon coated iron.

Washing your wireless bra shouldn’t be complicated, so we designed our products to be super easy to wash and care for. For best results, machine wash on cold with mild detergent in a wash bag, and lay flat to dry. That’s it!

If you are looking for a high impact, full coverage bra, our Catalyst Sports Bra cannot be beat. We recommend checking out the Front Zip style - a customer favorite for comfort and support!

More generally, you will need to determine the end use of the bra, for example:

For a sports bra or even for everyday bra, we recommend the Catalyst or Front Zip Catalyst.

We recommend using our tools in the Find My Size Section of the Size Guide to find your best fit. To process a return or exchange you can do so here.