Microtencel

High Octane Sports Bra

$92.00

Size: XS

XS S M L

Color: Umber

Sports bras

Find your size

Our bras run true to size. If you are between sizes, size up for comfort or size down for a firmer hold.

On the model

Our model is 5'8" and normally wears a 32B. She wears a size XS in the Studio sports bra.

Size chart

Measurements are of your body, not the garment. Use your bra size as a starting point and confirm it against your measurements.

Size	Bra size	Underbust	Bust
XS	30A, 30B, 32A	26 to 28" 66 to 71 cm	31 to 33.5" 79 to 85 cm
S	32B, 32C, 34A	28 to 30.5" 71 to 77 cm	33.5 to 36" 85 to 91 cm
M	34B, 34C, 36A	30.5 to 33" 77 to 84 cm	36 to 38.5" 91 to 98 cm
L	36B, 36C, 38A	33 to 36" 84 to 91 cm	38.5 to 41" 98 to 104 cm

How to measure

Measure without a bra on, or in a thin unpadded one. Keep the tape level all the way around.

Underbust

Measure directly under your bust where a band would sit. Pull the tape snug and breathe out. This is the number that decides your size.

Bust

Measure around the fullest part of your bust, keeping the tape loose enough not to compress. Stand relaxed with your arms down.

How it fits

SupportLight to medium, no underwire

CoverageFull front, scoop neck

StrapsFixed width, no adjusters

BackRacerback, pulls over the head

PadsRemovable, included in every size

OpacityFully opaque in every color

Check the fit at home

Try it on before you take the tags off. Four things to look for.

The band

It should sit level across your back and stay put when you raise your arms. You should be able to slide two fingers underneath, no more.

The cups

Smooth with no gaping at the top and no spillage at the edges. Gaping means size down, spillage means size up.

The straps

They should rest on your shoulders without digging in. If they dig, the band is doing too little work and you likely need to size down.

Movement

Jump a few times. You want light movement and no bounce, and you should be able to take a full breath without effort.

Studio or Cardio

Both fit the same way, so keep your usual size in either. The difference is the fabric and the level of support.

Studio

Certified organic cotton with light support. Made for the studio, slow days and wearing under everything else.

Cardio

Microtencel with medium support. Cool, light and quick to dry. Made for running, heat and higher output.

Between two sizes and unsure? Order both and send one back. Returns and exchanges are free within 30 days, worn or unworn.

Take the fabric quiz Leggings sizing Ask us a question

FABRIC FEEL

Softness

Breathability

Stretch

Compression

Free returns

Certified clean fabric

Made in Portugal

Product Description

A Microtencel sports bra for running, heat and anything that raises your heart rate. A soft V neckline and medium support, no underwire, in a fabric that stays cool against skin and dries fast. Smooth enough to wear for hours.

Details & fit

Medium support, no underwire. Soft V neckline with full front coverage. Straight straps, no adjusters. Elastic underband, pulls over the head. True to size, sizes XS to L. Model is 5'8" and wears XS.

Fabric & care

Made from Microtencel with a nontoxic stretch fiber. The fabric is Cradle to Cradle certified. Machine wash cold, hang dry, no fabric softener.

Shipping & returns

Free shipping on orders over $225. If it's not right, returns are easy within 18 days, no awkward questions.

Complete The Look

High Octane Sports Bra

$92.00

Ships 2026-11-23

XS / Umber

Fit & feel

Soft, but certain.

Smooth TENCEL™ Lyocell in a close-fitting silhouette. Made to feel good when you’re moving, and when you’re taking a moment.

Neckline: V-neck Scoop
Back: Racerback
Support: Medium support
Best for: Running, training, high-intensity movement
Feel: Smooth, soft against skin

The fabric

Naturally soft TENCEL™ Lyocell fibers bring a smooth touch to a piece made to sit close to your body.

It starts with wood pulp. The cellulose is dissolved and formed into lyocell fibers, giving Cardio its distinctive feel.

More than 99.8% of the solvent used to produce TENCEL™ Lyocell fibers is recovered and reused. Thoughtful from the fiber onward.

1 / 3

No PFAS, ever

We never use forever chemicals for water or stain resistance, even where it would be easier to.

Sourced with care

The wood used to make TENCEL™ Lyocell fibers comes from certified or controlled sources.

Tested, not assumed

Every fabric is lab tested for the chemicals most activewear doesn't check for.

Certifications apply to the fabric. Read how we choose our materials

High Octane

Frequent Questions

What is it made of?

88% micro lyocell and 12% elastane, in a 275 gsm knit. Micro lyocell is a fine fiber made from wood pulp. Our elastane holds a Cradle to Cradle Certified® Material Health Gold certificate.

What is micro lyocell?

A plant-based fiber spun from wood pulp. It's naturally breathable and soft against the skin, with a smooth hand that suits close-fitting pieces. High Octane has an ever so slight sheen, and is more compressive, hard-wearing, and sweat-wicking than our cotton.

What activities is it best for?

This line is for your high intensity activities– those days when you’re really giving it your all. They can handle a bit of wear and tear and a lot of sweat!

Is it see-through?

No–we’ve tested it extensively in a deep squat under bright light.

How does it fit?

Like The Studio line, High Octane can look a bit smaller but stretches to fit just right. If you’re on the fence, size ever so slightly up.

How do I care for it?

Machine wash cold or at 86 fahrenheit on a gentle cycle, no bleach. Tumble dry low or line dry. Skip fabric softener, which coats the fibers over time.

Pairs well with