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Groundwork Long Bra

Groundwork Long Bra

W's Groundwork Long Bra

Heads up, this gear will ship in 3-5 weeks. Learn more about pre-orders.


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run everywhere guarantee
free shipping over $50
free 60 day exchanges

Regular fit Size Chart Blake is 5'7" and wears size S

Essential coverage for high-output movement — the Groundwork Long Bra duals as a sleek standalone crop top. Read more

Explore more

Smooth racerback fit

Racerback design with wider shoulder straps + self-binded fabric provide optimal next-to-skin comfort 

Seamless hemline

Laser cut hemline allows for a seamless, chafe-free finish



All about the Groundwork
Breathable, moisture-wicking fabric provides light compression with an unnoticeable feel in stride

Improved support
Lightly padded, removable inserts plus soft elastic internal band add extra support + compression

Smooth racerback fit
Racerback design with wider shoulder straps + self-binded fabric provide optimal next-to-skin comfort

Power mesh lining
Increases breathability + adds targeted support

Seamless hemline
Laser cut hemline allows for a seamless, chafe-free finish

Janji signature blue reflective logo on back

materials + specs

Groundwork Knit
68% nylon, 32% spandex

Power mesh lining
100% polyester

102g / 3.6oz (W’s Small)

Garment made in Vietnam

Fabric Callout


High-performance, moisture-wicking stretch nylon with durable support. Explore more behind our tights and sports bra fabric.


care instructions

Wash before first use on cold with like colors

Tumble dry low

Heads up — some color bleed may occur
Color bleed, especially with darker colored nylon/spandex blends, is common and could stain light colored garments if washed together.


Groundwork Knit is made using a premium grade nylon that has a significantly tighter woven filament than standard synthetics. Tighter filaments mean less microfiber shedding in the wash-cycle, plus greater durability of the garment (longer lifespan, more wearing).

Groundwork Knit fabric is also bluesign® certified meaning it is free from harmful chemicals and is fabricated in a way that meets a high environmental standard.

Learn more about our sustainable initiatives here.


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Customer Reviews

Based on 18 reviews
Michele L.
Wear it for: Running, Cycling
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: S
Size Purchased: S

W's Groundwork Long Bra

Mackenzie L.
Wear it for: Running, Hiking, Camping, Climbing, Cycling
Product Fit: Runs small
Height: 5'7" to 5'9"
Usual Size: M
Size Purchased: M
Such a comfortable bra!

I got this in teal and absolutely love the color, plus its long enough that I can wear it as a top but works like a sports bra so I can use it wherever!

Jessica R.
Wear it for: Running, Hiking, Camping, Cycling
Product Fit: Runs small
Height: 5'0" or shorter
Usual Size: XS
Size Purchased: S
Goto bra for every activity

I was SO excited when this bra came out. I ordered it in black and quickly became obsessed. I now have it in all three colors (please release more!). It is by far one of my favorite and most used Janji items, especially for running and hiking. I love the groundwork fabric, length and fit of the top. You can wear it as a bra under layers or just rock it solo. I've gotten so many compliments on it. I'm 32C/D and the small fits perfectly. Lastly, adding a pocket to the back would take this to the next level!

Love this top

This long bra is great. I have it in two colors. It fits well and is super comfortable while running. I find that I get too hot running in it on the hottest days of the summer, but most other runs in this long bra is great. I will likely be getting more!


I am obsessed with this long crop bra. The fit, the breathability of the fabric, the cut is super flattering and I LOVE the color. I've gotten so many compliments on it and feel confident wearing it without a tank or shirt on top.

Malory P.
Very cute, perfect for fast runs

I love this long bra! I got size small in jasper color. I felt more comfortable taking the padding out, but it was still supportive. I find that if I use it with a running pack it rolls up a bit, so I suggest using this one for pack-less or shorter runs. I get lots of compliments on it! It is definitely snug, so I could have probably gotten away with a medium too.

Aitana B.
Better than I imagined

I was just hoping for a supportive sports bra but what I found was much more. This makes such an excellent crop top and I've been loving it on my warmer runs. The cut of it is so great and really does wonders. For size reference, I was nervous about the fit because I typically wear a small in tops but have a wide ribcage. I'm a 36C in bras and a medium provides great support.

Hallie W.

W's Groundwork Long Bra

Maria H.
For the roads, trails, and bars

This top is so flattering! It says long bra but it feels more like a crop top. It has a builty in shelf bra made of mesh on the inside. I am pretty small chested so it provides great support for me, but I can imagine it might not for bigger chested folks. The outer layer is made of a slick and sleek technical material, which I love. The cut on the chest is so cute and I honestly think I will wear this running but will also pair it with a cute skirt. I will definitely wear it out to a bar when the pandemic is over. I have a bit of a small waist and love handles so I will probably only wear this with a high waisted bottom because it does accentuate my love handles with low rise bottoms.

Feels like run wear, looks like street wear.


I love this sports bra. I'm actually excited for warmer weather where I can wear it without a shirt over it--for that reason I love the slightly longer fit. The fabric is a bit softer than the groundwork tights, but just as durable and functional. The cut of the bra is incredibly comfortable and perfect for running. The only thing that would have made this better is a back pocket--there is certainly room for one. This would make it the perfect sports bra!