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Home / Bras / Catalyst Front Zip Sports Bra
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Catalyst Front Zip Sports Bra

$85.00 USD

10% off Bra & Underwear Sets*
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Our most supportive sports bra

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Ventilation for increased airflow

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Full coverage fit

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Easy on and off front zip

Sarah is a 34DD and wears a Knix size 6+ | Black

Sarah is a 34DD and wears a Knix size 6+

| Black
Sarah is a 34DD and wears a Knix size 6+ | Black

Sarah is a 34DD and wears a Knix size 6+

Sarah is a 34DD and wears a Knix size 6+ | Black

Sarah is a 34DD and wears a Knix size 6+

| General
Easy front zip closure | General

Easy front zip closure

Adjustable back closure and cross straps | General

Adjustable back closure and cross straps

Sarah is a 34DD and wears a Knix size 6+

Color: Black

Size:

True to Size

•

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.

All States - Urban Centers (except Hawaii, Alaska)
Standard: Sunday, December 14
Express: Tuesday, December 17

Alaska, Hawaii & Rural
Standard: Wednesday, December 10
Express: Wednesday, December 10
Express shipping is unavailable for international orders:

Africa, Central/South America, and Caribbean
Standard: Wednesday, December 10

Asia, Australia, and New Zealand 
Standard: Thursday, December 11

Europe and the Middle East 
Standard: Thursday, December 11

United Kingdom, France, Germany, Netherlands, Switzerland, and Japan 
Standard: Monday, December 15

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

Processing Time
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* USD = Free standard Shipping (4-8 business days)**
Expedited = $4.99 USD (3-6 business days)**

Orders under $100* USD = $7.99 USD Standard Shipping (4-8 days)**
Expedited = $9.99 USD (3-6 business days)**

*After discounts, before shipping and taxes. Processing times not included in estimates.
**Military Addresses Excluded. Standard Military Address Shipping = $10.00 USD (est. varies per location)
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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"Most supportive sports bra."

- Good Housekeeping

High Impact Support

You are in control of your performance with our most supportive, full-coverage sports bra. Made with encapsulated cups for maximum support and locked in feel.

Feels Made For You

The traditional adjustable hook and eye back closure, featuring five rows, allows you to find the perfect fit easily. Easy front zip closure. Ventilation in the front helps you stay cool throughout your workout.

Functional Style

The breathable, moisture-wicking fabric and ventilation in the front help you stay cool throughout your workout. Made with encapsulated cups for maximum support and a locked-in feel.

Zoom

Sarah is a 34DD and wears a Knix size 6+ | Black
| Black
Sarah is a 34DD and wears a Knix size 6+ | Black
Sarah is a 34DD and wears a Knix size 6+ | Black
| General
Easy front zip closure | General
Adjustable back closure and cross straps | General

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

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4.2
Rated 4.2 out of 5 stars
Based on 3,056 reviews
Total 5 star reviews: 1.9k Total 4 star reviews: 516 Total 3 star reviews: 259 Total 2 star reviews: 163 Total 1 star reviews: 213
84%would recommend this product
ComfortRated 4.3 on a scale of 1 to 5
FitRated -0.1 on a scale of minus 2 to 2
SupportRated 4.5 on a scale of 1 to 5
Write a Review (Opens in a new window)
3,056 reviews
  • Rated 5 out of 5 stars
    18 hours ago
    Recommended!

    Very comfortable, true to size, good support. Breathable, felt great even at the end of my shift after wearing in clinic all day. Recommended!

    Vikie B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    Yesterday
    Zip Sports Bra

    Love the bra. I have shoulder problems and this is so easy to get on. Exceptional quality.

    Melody J.
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    3 days ago
    Catalyst is the best for larger bust support

    Catalyst is the only bra style I have worn for years. It is amazing for larger busted (34E) women who want as much support as possible, without feeling like body armor. It is almost seamless, nice wide straps, extremely good quality that lasts years. This is the first time I have tried the front zip Catalyst, and I don't love it compared to the regular version. The front zipper has a bulky top on it that can be seen through clothes, and the racer back is gives me neck pain, but for a racer back sports bra it is as good as it gets.

    Michelle G.
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    3 days ago
    Catalyst front zip sports bra

    Most comfortable sports bra I’ve ever owned. So sad it’s been discontinued.

    Judy B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Love it

    It fits wonderfully. I generally dislike bras. This one is very comfortable.

    Robin H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 weeks ago
    Love it!

    Just the bra I needed for when I go on my runs

    Bev W.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    3 weeks ago
    Comfortable ut a bit snug at first

    I had to exchange si e and the process was smooth. The bra fits well other than being quite snug at first. I would recommend very comfy.

    Hélène M.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    1 month ago
    Zipper end sticks out

    I really like this bra. Support, strap width, versatility of the straps….. only negative is the zipper end bulges out and no matter how much I try to tuck it in, you can definitely see it when wearing it t-shirt

    Sharon
    Was this helpful?
  • Rated 2 out of 5 stars
    1 month ago
    Not great for a full bust

    First of all, Knix bra sizing is way off. Whatever your regular bra size is, go up at least two more sizes. When I did get a replacement in what's my correct size for Knix, the design and build of the bra isn't great. It pushes everything up way too much and creates a bulge at your arm pits (even though the size is correct, it's just the design of the bra). Also, the zipper creates a bulge that if you have a shirt over it, it looks like you have a third nipple.

    DP
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Top Notch Comfort and Support

    I have been wearing the Catalyst Front Zip Sports Bra for years. It is top notch on comfort and support. The front zip makes it easy to get on and off.

    Katie D.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    I own 3 of these bras and wear everyweek for strength training. I’m 73 with arthritic hands so i love the front zipper. Great coverage and don’t ride up!

    Karen
    Was this helpful?
  • Rated 1 out of 5 stars
    1 month ago
    Zippers no good

    I ordered 2 of these bras, have only worn each about 3 times and the zippers pull apart after doing them up. Unfortunate because I really like them on, but cannot recommend them. Waste of hard earned money.

    Alison D.
    Verified Buyer
    Was this helpful?