Origin Sports Bra - Black
Double-layered support through the body with a box silhouette and a slightly lower-cut back. One-inch straps fixed in place and cut wider under the arm, so nothing digs in over a full day.
49% seaweed-enriched cellulose against the skin. 44% bio-nylon from castor oil. 7% bio-elastane from corn. No petroleum-derived polyester, nylon or spandex. Every fibre certified to OEKO-TEX Standard 100.
The cellulose is tested for antioxidant activity. Dermatologically tested, rated Excellent. Finished with a moisture-wicking treatment derived from micro-algae.
Free returns and free exchanges within 14 days. Free shipping on orders of two or more. Delivered in 3 to 5 business days, worldwide.
KEY FEATURES
- Medium-impact support
- Double-layered construction
- Box silhouette with lower-cut back
- 1" fixed straps, wider cut under the arm
- Seamless whole-garment knit
- Four-way stretch
- Buttery-soft hand feel
MATERIAL INNOVATION
- 49% seaweed-enriched cellulose
- 44% bio-nylon (100% bio-based, from castor plant oil)
- 7% bio-elastane (100% bio-based, from corn feedstock)
- Seamless whole-garment knit construction
- Cellulose fibres degrade in soil in approximately 41 days, at fibre level
- OEKO-TEX Standard 100 Class I certified at the fibre level
- Finished fabric independently tested for antioxidant activity (OMPG, TEAC assay)
- Dermatologically rated Excellent for skin compatibility (Dermatest)
- Micro-algae moisture-wicking finish for durable fast-dry performance
- Fibres sourced from Europe and Asia. Knitted and finished in China.
SIZE & FIT
- Model is wearing a Small
- Model is 173cm Tall
- Model Bust 83cm
- Medium Fit: Supportive but flexible
FREE SHIPPING, FREE RETURNS
Free returns and free exchanges within 14 days of delivery,
anywhere in the world.
We cover the shipping both ways.
Experience the fabric on skin.
PRODUCT CARE
- Cold machine wash (30°C or below)
- Mild detergent only
- No bleach
- Avoid fabric softeners to maintain integrity of the micro-algae moisture-wicking finish
- Air dry where possible
- Tumble dry on low if needed
- Do not iron directly on print or label
SUSTAINABILITY
- Bio-nylon: 25% lower CO₂ than standard nylon
- Bio-elastane: 20% lower GHG than standard elastane
- Cellulose feedstock: FSC-certified wood pulp and seaweed
- Micro-algae moisture-wicking treatment: 80% lower carbon footprint versus conventional synthetic finishes
- Cellulose fibres degrade in soil in approximately 41 days, at fibre level
Origin Sports Bra - Black
Tested, not claimed.
Independent laboratory results on a finished garment: the Core Tank in Black, pre-shrunk, as it ships.
Measured across the finished Core Tank.
Measured along the finished Core Tank. Together, the two axes of a four-way stretch.
After three washes. Body, shoulder, chest and hem measured 0.0%.
Rated 4 to 5 for washing, sweat and dry rub, and 4 for wet rub.
Mechanical results from independent testing of the Core Tank in Black by Qualspec, August 2026. Every result, on the Material page
In their words.
“It has this sculpting and supportive feel without feeling too tight. It feels like premium activewear and I will be adding it to my weekly rotation.”Natalya
“They're in this ribbed material which is so soft and super stretchy, a really nice finish on the body. The best part is these are made from completely plant-based materials.”Nai
“It's incredibly soft on my skin and it has that supportive compression, but it's still really breathable and stretchy. can't believe the fabric is entirely plant-based.”Aime V
“Perfect everyday activewear. It’s supportive in the right places without feeling restrictive. Super stretchy, really comfortable, and easy to move in. I can wear it from a workout straight into the rest of my day without needing to change.”Kirby
“This is super comfy and super flattering, with a buttery feel. And if you're in the market for activewear that is better for your skin, breathable and non-tox, this is your guy.”Amelia Jane
“Love that this is plant-based. My skin usually reacts to activewear but I’ve had no issues wearing this for hours after a workout. It’s soft, breathable, and doesn’t feel heavy even though the fabric feels quite premium.”Natalya
Worn, and reviewed.
Bundle two or more items for free global shipping.
The Pure Movement.
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