#1 Bra
Sophie is 177 cm and wears L.

COTTON

Core Triangle Bralette

Core Triangle Bralette

£42
£42
90% organic cotton
Color: Black
Color
Size
Only 0 left in stock

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Produced using -1% less kgCO₂e than industry standard
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• 90% Organic Cotton
• V-Neckline
• Medium Support
• Unpadded
• Free from harmful chemicals
Free from harmful chemicals
This product is GOTS-certified. GOTS has strict chemical criteria aimed at protecting the health of workers, the environment and the end consumer. GOTS prohibits allergenic and carcinogenic chemicals, and those that don’t meet rigorous conditions, including flame retardants, PFAS and toxic dyes.

This buttery-soft triangle bralette has a plunging front and is made with 90% ultra-smooth organic cotton. Breathable and feeling like a second skin, it has zero wires – but plenty of support.

  • Triangle bralette with a full cup coverage, medium support and a light lift
  • Wireless design with supportive elastic underband covered in soft fabric
  • Unpadded, with triple layered cotton cups for best support, hold and look
  • Soft wear that lets your natural shape show
  • Low-cut to work with multiple different necklines
  • Adjustable straps
  • Adjustable hook-and-eye closure
  • Made with 90% organic cotton
  • Soft and stretchy with 10% added elastane Please note: for our + sizes, and for XXL and XXXL this bra has overlapping cups in the front to offer the best support.
  • Runs big—if between sizes, we recommend to size down
  • For best hold, the underband and side wings should fit snugly
  • Choose a size where you fully fill out the cups for optimal support and comfort
  • If your bust spills over the cups or sides, loosen the straps or size up
  • If the cups wrinkle, gape, or feel too loose, size down

Cotton is a natural fiber that is commonly used for its breathability and softness. Using organic cotton instead of regular cotton has the potential to build soil health, as it is grown without the use of synthetic fertilizers. - 90% Organic Cotton, 10% Elastane - Hand wash cold - Only non-chlorine bleach when needed. Do not iron. Do not dry clean.

Made in Indonesia

Established in 1977, PT. Liebra Permana is a family-owned factory that quickly expanded into one of the top production facilities in Indonesia. By using cutting-edge technologies like SAP, LP4M, HI-TECH, and TUKATECH, this factory streamlines its processes to minimize waste, while manufacturing high-quality pieces that last.

0 % less kg CO2e
OUR Product Footprint2.49kg CO2e
Industry Standard2.47kg CO2e
kg CO2e
Tier 01: Garment Assembly
Final assembly of the items, often referred to as cut & sew facility
0.86
Tier 02: Dyeing
Preparation and production of subcomponents such as fabrics and trims
0.88
Tier 03: Spinning
Process of raw material such as yarn production
0.45
Tier 04: Raw Material
Cultivation, production and extraction of raw materials from earth, plants and animals, such as cotton cultivation
0.20
Packaging
Packaging of the final product such as tags, glassine bags and boxes
0.08
Transport
Transport of products from the site of final assembly to the distribution centre
0.02
Use + End of life
Use, care and disposal of clothing, including washing
0.00
Traceability
Tier 01: Garment Assembly
Final assembly of the items, often referred to as cut & sew facility
Indonesia
Tier 02: Dyeing
Preparation and production of subcomponents such as fabrics and trims
China
Tier 03: Spinning
Process of raw material such as yarn production
China
Tier 04: Raw Material
Cultivation, production and extraction of raw materials from earth, plants and animals, such as cotton cultivation
Indonesia
Packaging
Packaging of the final product such as tags, glassine bags and boxes
China
Transport
Transport of products from the site of final assembly to the distribution centre
Sea
Use + End of life
Use, care and disposal of clothing, including washing
Spain
Total ImpactSavings
Acidification
Indicator of the potential acidification of soils and water due to the release of gases such as nitrogen oxides and sulphur oxides.
0.02 mol H+-Eq
9%
Energy
Use of energy across all processes and sub-processes, such as use of electricity and heat sources.
8.19 MJ
19%
Eutrophication
Indicator of the enrichment of the aquatic ecosystem with nutritional elements, due to the emission of nitrogen or phosphor containing compounds.
0.04 mol N-Eq
22%
Freshwater Ecotoxicity
Impact on freshwater organisms of toxic substances emitted to the environment.
19.27 CTUe
81%
Greenhouse gases
Greenhouse gases are those that absorb and emit infrared radiation in the wavelength range emitted by Earth. Measured in CO2 equivalent, it includes gases such as carbon dioxide, nitrous oxide and methane.
2.49 kg CO2e
-1%
Land
The environmental impacts of occupying, reshaping and managing land for human purposes.
54.41 pts
-61%
Water
The sum of water used in the direct-process or sub-processes (such as energy generation).
2.69 m3
3%
This data comes from a Life Cycle Assessment conducted by Made2Flow, specifically for the product featured on this page. These calculations apply to the most recent delivery of this product to our warehouse in 2025 and will be refreshed annually if the product is restocked. Read more about the calculations here.
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Core Briefs
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Overall rating: 4.768161 / 5 from 647 reviews.

AI Generated Review Summary

The Core Triangle Bralette is praised for its buttery-soft, breathable material made from 90% ultra-smooth organic cotton. Customers appreciate its flattering look, vibrant color, and the great support and comfort it provides. However, opinions on the size and cup fit vary among users.

Summary topics

  • Material Feel (7%): It was noted by customers that the material of the product feels nice and soft on the skin.
  • Overall Fit (28%): A significant number of customers appreciated the fit of the product, describing it as perfect and true to size.
  • Overall Support (9%): Customers loved the great support and comfort provided by this bra, making it a popular choice.
  • Product Appearance (6%): Customers expressed satisfaction with the look of the product, stating that it looks good and flattering.
  • Product Color (12%): Customers expressed appreciation for the vibrant and beautiful color of the product, mentioning it multiple times.

Review topics: [size, fit, straps, support, color, fabric, material, feels, design, quality, shape, bra, style, band, seams, cups, texture, bralette, chest, underwire, cotton, side, underband, layer].

Review highlights

  • "High quality, comfortable cotton, strong straps, good support and a very good fit." — Kim R.
  • "Great fit, comfortable, and I love the colour for summer!" — Krysten O.
  • "Double thickness cups mean a nice smooth line and the wide band and straps give good support." — Claire H.

Reviews

Comfy and Versatile

"The color is perfect (hazelnut), works under everything. I got an Xs I’m about a 30-32 A and it fits on the largest loop so I have 3 smaller sizes when it stretches out after use. It’s buttery soft. Straps have more than enough length to accommodate short or long torso length. Coverage and cut hides perfectly his under all my shirts, I really like that the straps in the back are not thick triangles that attach to the back strap, they’re just the skinny straps. Love this investment in an organic cotton staple!"

— Raquel G. (5/5)

This is a well constructed

"This is a well constructed item and I'm loving the colour! There is more elastane then I thought there would be - more than ideally I would like - ( I should have read the description closer, I'm guessing) and the size Small I bought just about contains my 32 C/D bust. I will certainly be buying more items from Organic Basics."

— Elizabeth S. (5/5)

Ich habe dieses Modell vor

"Ich habe dieses Modell vor der Schwangerschaft super gerne getragen, der BH ist schön weich, Ultra bequem und hat mir damals ausreichend Halt gegeben. Jetzt ist meine Oberweite deutlich größer und ich habe extra ausgemessen und nach Größentabelle bestellt. Bei der Anprobe dachte ich, die Größe passt, aber im Alltag verrutscht der BH leider und meine Brüste fallen raus. Das ist sehr unangenehm, deswegen würde ich das Modell für eine größere Oberweite eher nicht empfehlen. Im Zweifel auch lieber noch eine Nummer größer kaufen. Der BH ist aber auch eher knapp geschnitten und verrutscht vllt deshalb eher."

— Celina H. (4/5)

Great everyday bra but size up!

"Lovely soft fabric! I originally bought xs based on the measurements but returned for a s. Definitely size up, especially if you are a larger cup size - I’m a D/DD. I’ve since ordered the s+ which I prefer for everyday wear due to the thicker straps and more coverage in the front. I’ll be keeping the s for lower cut / thin strap clothing."

— Rachel S. (4/5)

Gorgeous colour, perfect fit

"Perfect summary colour and the softest material. Purchased a size s, as a size 8(uk), 32c. Fastens on the tightest hook and eye so could probably have gotten away with an xs too"

— Louise R. (5/5)

Perfect quality and fit

"Gorgeous bralette. Very soft and smooth material, the colour is so pretty and unusual. True to size, I got a small as a 5”, size 8(uk), 32C, fastened on the tightest hook and eye."

— Louise R. (5/5)

Beautiful colour, really bright red.

"Beautiful colour, really bright red. Had a bit of a problem finding the right size. I normally wear an L+ bun unfortunately it’s not available in this colour. According to the size chart I would need an L but that was really unsupportive compared to L+. Thinner straps,side piece etc. Changed for an XL which was better for these parts but the coverage in front was not enough for me, when moving my boobs would fall out. But because I love the quality and colour so much I made an adjustment myself, sewed the lower parts of the cups together, now it’s perfect!"

— Loes F. (5/5)

Core Triangle Bralette

"It's a nice one, but for large bust had to exchange for 2 sizes up. The one thing I wanted to mention, a lot of bra have natural cotton material, but the lining was 100% or 50 % synthetics. That is so frustrating, I wanted to buy couple more bras, but didn't because all the linings are Polyester, nylon or Spandex"

— Tetiana L. (5/5)

Great bralette, very happy

"Fabulous colour and quality bralette. I bought in 4 different colours and couldn’t be happier. Purchased a s, as a size 8(uk), 32c and it fits beautifully. Could probably have gotten away with an xs also"

— Louise R. (5/5)

Great Bra!

"I absolutely love this bra! I loved it so much that I purchased it in a bunch of colors! I love that it is made with organic cotton. It feels so nice next to skin! I love the fit and the style. I don't like my bras too tight so even though I am a small, I got it in a medium and I am super happy with the fit for my preferences!"

— Shellie (5/5)

Q&A

Can I use optional padding in this bra?
Hi Nina, unfortunately, this bra doesn’t allow for any additional padding to be added.