Boom Bra


Color: White
1 in stock

Our wear testers are calling this a new high support favorite. And high support never looked so good - with an elegant design front and back. The chest band includes our signature ribbed elastic, and plush hook and eye closure for adjustability. Wide elastic straps in the back provide an even more custom fit. The straps are padded, to avoid digging in, and the molded cups include perforation for heat release, while holding you securely through any kind of movement, from high impact to low.

How to Determine Your Sports Bra Size


• Adjustable, padded straps
• Hook and eye closure
• Molded cups
• Compression level: 3


• Plya Compression (polyester / spandex)

Learn more on our Fabrics page.

Size and Fit

Model Information:
• Juniper: Cassandra is 5'8" and wearing size 34D

At Oiselle, our vision is to help all women feel strong and free through the joy of running. Our mission is to design great product, build the sisterhood, and improve the sport. May we all experience the transformative power of sports and community.

Customer Reviews

Based on 27 reviews
Finally, a great bra for the big gals

I'm so glad to have found Oiselle, and this is the best of their bras I have tried. According to their sizing instructions I am a 34DD, and that size works well. The only down side is that the material is so thick, it takes a long time to dry. I bring a spare casual bra with me to my trail runs so I can change after the run so the journey home is pleasant. You really don't think about your boobs at all when you are running with this bra -- exactly what you want! I used Champion running bras for many years but the last few I've gotten have not worked, they rub off the skin under the band and I can't run for a week until that heals. I'm so glad I found Oiselle!

Feels great but not enough support for bigger boobs

The design and color of this bra are lovely. Feels very soft on and fits perfectly (no gapping or overspill of cups, no cleavage, secure band). It’s great for a gym workout, hiking and yard work, and will work for a short recovery run in a pinch, but not nearly enough compression for any longer runs or speed work for my 38DDs—definitely several inches of vertical movement. The search continues!


I feel like Oiselle’s bra sizing is a little inconsistent. I followed the size chart and had to size down on another bra, and this one in my normal size is so tight I could barely get it on.
It feels ok once it's on, but the clasp is hanging on for dear life. The fabric is thick and warm, but very supportive. I'm on a fitness journey so I'm hoping this bra will fit a little better in a couple months.
Shipping was quite slow.

The only bra I’ll wear running

I never write reviews but I just have to for this one. This is the only bra I will wear running. I’m a 38C and it fits perfectly in all the right places, I it holds me in without smushing me in, and the full coverage is amazing for the gym too (I do Olympic lifting and it’s perfect for that too). It also doesn’t dig in anywhere, doesn’t chafe, and I don’t bounce when running. I wish they had more colors of my size in stock!!