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W's Infinity Sports Bra

Lightweight + reversible for infinite styling options
$48

37 reviews

Unpadded and unfussy, the Infinity Sports Bra is an easy pullover silhouette with light-to-medium support and good coverage. Made in our smooth and stretchy signature Groundwork knit fabric, this sports bra offers both a solid colorblock and printed side for a choose-your-own-adventure styling.

Color: Dandelion_Thistle
Size
Regular fit
Features

Double the wear
Reversible styling allows for double the kit matching

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

Ultra-lightweight support
Dual-sided fabric is lined with powermesh for breathable, barely-there support

Power mesh lining
Increases breathability + adds targeted support
Materials + Specs

Groundwork Knit
68% nylon, 32% spandex

Power mesh lining
100% polyester

Weight
102g / 3.6oz (W’s Small)

Garment made in Vietnam
Sustainability

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.

2% for clean water

2% from this purchase will be donated to support clean water projects in the places that inspire us. Learn more about our support for clean water.

Backed by our 5-year Guarantee

We make gear that lasts. If your Janji gear doesn't due to any defect in workmanship or material, we promise to repair it, replace it, or give you store credit for it. Learn more about our guarantee.

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Customer Reviews

Based on 37 reviews
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D
Dani S.
Wear it for: Running
Product Fit: Runs large
Height: 5'1" to 5'3"
Usual Size: M
Size Purchased: S
Just what a long distance bra should be

Just as it says no fuss bra. No spongy cups to hold extra water, no clasps to rub or chafe, enough compression to get along with living on earth- with gravity. I ordered a originally ordered a medium immediately washed and got it ready to run in and realized it was too big- moved across my skin, found a friend to pass it on to as I couldn’t return it after washing and wearing, bought a small and it’s perfect. (I’m generally 34-36 B or C depending on the bra maker.)

A
Ash
Wear it for: Cycling
Product Fit: Spot-on
Height: 5'1" to 5'3"
Usual Size: M
Size Purchased: M
Fantastic

The design is bright and beautiful and unique, and the bra itself is comfortable during activity. I bought this with shorts and hat, and I love the combination!

D
Dr. G.
Wear it for: Running
Product Fit: Spot-on
Height: 5'1" to 5'3"
Usual Size: S
Size Purchased: S
Like butter

Love this bra. Soft, supportive and not excruciatingly tight. I like the coverage especially under a pack to reduce chaffing. Perfect. I need three more.

A
Amy

Keeps the girls on lockdown, dries fast, and no chafing. I’m getting another as soon as I can because I LOVE that they are reversible! So versatile!

A
Alexandra
Wear it for: Running
Product Fit: Spot-on
Height: 5'1" to 5'3"
Usual Size: S
Size Purchased: S
Love it!

Love the feel of the fabric and the fit of this bra. I paired it with the with the W's 3" AFO Rhythm Short. The Dandelion looks amazing on a tan. I am a 34 A and purchased a size Small.

N
Natali L.
Wear it for: Running, Hiking
Product Fit: Spot-on
Height: 5'1" to 5'3"
Usual Size: S
Size Purchased: S
Great support/confortable

Love the color. Well made and med/strong support.

N
Nicasio C.
Wear it for: Running
Product Fit: Spot-on
Height: 5'1" to 5'3"
Usual Size: S
Size Purchased: S
Excelente 👌🏻

Bonito 🫶🏻

E
Ericka
Wear it for: Running
Product Fit: Spot-on
Height: 5'1" to 5'3"
Usual Size: S
Size Purchased: S
Comfy and supportive

Comfy and supportive. No rubbing after a hot 50K. Great purchase!

S
SLM
Wear it for: Running
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: L
Size Purchased: L
runner bra

great bra

S
Seneca N.
Wear it for: Running, Cycling, Everyday wear
Product Fit: Runs large
Height: 5'4" to 5'6"
Usual Size: M
Size Purchased: S
50 mile approved!

I just ran my first ultra in the infinity, and it was perfect! I used to run exclusively in Nike swoosh sports bra, but now that they've made sewn in pads, I don't wear them. The infinity has a very similar feel to the original swoosh but reversible, which I also really like. I experienced no chafing, and was very comfortable. I ended up sizing down. I normally wear a medium in other janji bras I have tried.

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