Steadfastโข โ Outside-Wire High Impact Sports Bra for Fuller Busts + 50% OFF
Free US shipping
62,800+ happy customers
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Wow! We've Just Welcomed Our 62.000th Customer! Our Shelves Are Clearing Fast, So Grab Your Favorites in Our Spring Sale Before They Vanish!
Your Workout Deserves a Bra That Never Flinches
You know the feeling โ mid-run, mid-burpee, mid-jump โ and suddenly you're adjusting, tugging, wincing at the wire digging into your ribs. Every rep becomes a negotiation between your body and a bra that won't cooperate.
The truth is, most underwire sports bras were designed with the wire pressing directly against your skin โ and for fuller busts, that's a recipe for pain. Steadfastโข was engineered the opposite way.

The wire sits on the outside of the cup. A soft fabric barrier rests between the wire and your skin โ so you get full structured lift and separation with zero digging, zero poking, zero shifting.
That means you stop thinking about your bra entirely โ and start thinking only about your next rep, your next mile, your next personal best.

Why 10,000+ Customers Love Steadfastโข
โ STOP THE BOUNCE WITHOUT THE PAIN
The outside-wire construction places structured support around each cup from the exterior, while a soft fabric lining sits against your skin โ delivering powerful lift and separation without a single pressure point digging into your ribs.
โ STRAPS THAT STAY PUT THROUGH EVERY REP
Wide ladder-adjustable straps lock into your custom setting and stay there โ no slipping off shoulders mid-workout, no constant readjusting between sets, no lost focus.

โ STAY COOL WHEN YOUR WORKOUT HEATS UP
ย Breathable mesh panels across the back and sides wick sweat fast, while double-layer unlined cups deliver smooth shaping without trapping heat or adding bulk.
โ ONE BRA FOR EVERY WORKOUT YOU THROW AT IT
4-way stretch fabric moves with your body through running, HIIT, boxing, and gym training, while a 4-column ร 3-row hook closure lets you dial in the exact band tightness you need โ especially built for fuller busts that demand serious hold.

FAQ
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Can I feel the outside wire through the fabric?
No โ the wire is integrated into the exterior structure of the cup and covered by smooth fabric on both sides. You won't feel it against your skin or see it through clothing. What you will feel is structured lift without any digging or poking.
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How do I find the right size?
Measure your underbust in inches and match it to our sizing chart. The bra is available in band sizes 28-48 and cup sizes B through I. If you're between sizes, we recommend sizing up for the most comfortable fit.
Specifications
- Support Level: High Impact โ outside-wire construction with double-layer unlined cups
- Closure: 4-column ร 3-row hook-and-eye back closure with breathable mesh back panel
- Straps: Wide ladder-adjustable anti-slip straps with 4-way stretch fabric

Press "ADD TO CART" now to get your Steadfastโข Outside-Wire Sports Bra! This offer is available for a limited time only!
Free shipping on all orders - All orders are shipped free of charge.
24/7 customer service - Our customer support team is available daily to answer all your questions.
30-day money-back guarantee - If your experience is not positive for any reason, we will do everything we can to ensure you are 100% satisfied with your purchase.

They loved their productsโand we think you will too. See what some of our 62,800 customers had to say.
Isadoraโs customer service is fantastic! I had a question about sizing, and they responded so quickly and kindly. My order arrived on time, and everything fit perfectly. Such a great shopping experience!
Emily H. 1 day ago
Ordering from Isadora was so easy! The website is user-friendly, the checkout was smooth, and my order arrived quickly. The quality exceeded my expectationsโdefinitely shopping here again.
Mandy K. 6 hours ago
The variety at Isadora is amazing โ so many unique and stylish pieces to choose from. I found exactly what I was looking for, and it arrived quickly and in perfect condition. Already eyeing my next purchase!
Emma W. 1 day ago
What impressed me most about Isadora was the quality of the materials โ everything feels so well-made and durable. You can really tell they care about what they sell. The whole process was easy and pleasant!
Linda W. 1 day ago
Shopping at Isadora was a breeze! The website made everything straightforward, the payment process was quick, and shipping was fast. The quality is amazingโIโm so happy with my purchase!
Amanda S. 3 days ago
I loved ordering from Isadora! The whole processโfrom browsing to checkoutโwas seamless and stress-free. My order came quickly, and the quality blew me away. Highly recommend shopping here!
Madison O. 7 days ago
our Spring sale ends soon..
Youโve got less than 2 hours to save up to 60% OFF โ and then itโs gone! Thousands are grabbing their favorites before the clock runs out. Donโt miss out โ shop now before the deals disappear!
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Free US shipping
We offer free US shipping and tracking on all orders.
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30-day guarantee
Not satisfied with your product? No worriesโjust reach out to us for a full refund.
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Secure Payments
Shop secure with Credit Card, Apple Pay or Google Pay.
Steadfastโข โ Outside-Wire High Impact Sports Bra for Fuller Busts + 50% OFF
