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A deep plunge neckline bra in Cotton [Ksenia 1]
Shown here with our Whipped High Rise in Black [Ksenia 1]
Cotton Triangle Bra in Black
Wide elastic bland is comfortable and supportive [Ksenia 1]
Adjustable hook & eye and strap sliders in the back [Ksenia 1]
  • Thumbnail image #1 of Cotton Triangle Bra in Black [Ksenia 1]
  • Thumbnail image #2 of Cotton Triangle Bra in Black [Ksenia 1]
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  • Thumbnail image #4 of Cotton Triangle Bra in Black [Ksenia 1]
  • Thumbnail image #5 of Cotton Triangle Bra in Black [Ksenia 1]
A deep plunge neckline bra in Cotton [Ksenia 1] Shown here with our Whipped High Rise in Black [Ksenia 1] Cotton Triangle Bra in Black Wide elastic bland is comfortable and supportive [Ksenia 1] Adjustable hook & eye and strap sliders in the back [Ksenia 1]

Cotton Triangle Bra

4.3
Rated 4.3 out of 5 stars
230 Reviews

Softest Cotton. Triangle cut.


Super smooth, wireless, soft and stretchy with a plunge v neckline. Meet your new favorite.

Free U.S. shipping on orders over $100. Easy returns.

Fit

  • Size Chart
  • Use this as a guide. Preference is a huge factor — the benefit of a non-wire is they’re super flexible, so you will likely fit in more than one size. Like a looser band? Size up! Like less coverage? Size down! Still unsure? Try two sizes :)
  • Adjustable straps and hook & eye closure in the back
  • *Note, our Cotton Triangle Bra is an intentionally lower coverage in both the cups and the sides. Wide plush elastic band is extremely adaptable.

Fabric + Care

  • Size Chart
  • 79% Cotton, 21% Elastane is breathable and flexible
  • Wireless
  • Wash on delicates/cold, dry flat

FAQ

  • All full-priced, unworn items, with tags attached and in their original packaging are eligible for return or exchange within 30 days of placing your order.
  • Please note, packs must be returned in full. We do not accept partial returns of packs.
  • Want to know our full returns policies? Here you go.
  • Want more info about shipping, materials or care instructions? Here!

    Q’s on fit or sizing? Email us at hello@negativeunderwear.com

Pair it with ->

Sieve String Thong in Black Sieve String Thong in Black (alternate view) Sieve String Thong in Black $30
Cotton French Cut Brief in Black (Pack) Cotton French Cut Brief in Black (Pack) (alternate view) Cotton French Cut Brief in Black (Pack) $58 +
Whipped Boy Short in Black Whipped Boy Short in Black (alternate view) Whipped Boy Short in Black $45 +
Sieve High-Waist Brief in Black Sieve High-Waist Brief in Black (alternate view) Sieve High-Waist Brief in Black $45 +
4.3
Rated 4.3 out of 5 stars
Based on 230 reviews
Write a Review (Opens in a new window)
230 reviews
  • sarah l.
    Verified Buyer
    Size Purchased 1
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 32C
    3 minutes ago
    Size Purchased 1
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 32C
    Cotton Triangle Bra in Buff
    Reviewing
    Cotton Triangle Bra in Buff
    Rated 5 out of 5 stars
    Comfy and supportive

    I’m feeling pretty good about this bra! I feel supported and it’s comfy. FWIW: I’m normally a 32c.

    Was this helpful?
  • Natalia A.
    Verified Buyer
    Size Purchased 2
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 34D
    20 hours ago
    Size Purchased 2
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 34D
    Cotton Triangle Bra in Buff
    Reviewing
    Cotton Triangle Bra in Buff
    Rated 5 out of 5 stars
    I bought one in white a year ago and now bought one in Buff

    I bought one in white a year ago and now bought one in Buff. I love this bra. Very comfortable.

    Was this helpful?
  • Kym B.
    Verified Buyer
    Size Purchased 5
    How it Fits True to Size
    Age Range 55 - 64
    Bra Size 40C
    1 week ago
    Size Purchased 5
    How it Fits True to Size
    Age Range 55 - 64
    Bra Size 40C
    Cotton Triangle Bra in Buff
    Reviewing
    Cotton Triangle Bra in Buff
    Rated 5 out of 5 stars
    Cotton Triangle Bra

    Beautiful!

    Was this helpful?
  • Ruth T.
    Verified Buyer
    Size Purchased 2
    How it Fits True to Size
    Age Range 55 - 64
    Bra Size 32C
    1 month ago
    Size Purchased 2
    How it Fits True to Size
    Age Range 55 - 64
    Bra Size 32C
    Cotton Triangle Bra in White
    Reviewing
    Cotton Triangle Bra in White
    Rated 5 out of 5 stars
    Perfect

    Comfortable

    Was this helpful?
  • Heather C.
    Verified Buyer
    Size Purchased 1
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 34A
    1 month ago
    Size Purchased 1
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 34A
    Cotton Triangle Bra in Buff
    Reviewing
    Cotton Triangle Bra in Buff
    Rated 4 out of 5 stars
    Good but not great

    I got this with a pack of the Sieve material equivalent bras and assumed I'd prefer the cotton, but this is actually my least favorite. The cotton doesn't stretch and move with me as well as the meshy material and I find myself waiting to pick this one until laundry day.

    Was this helpful?
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Non-Wire Bra Sizing

Non-Wire Bra Sizing Size Chart

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Detail view of Cotton Triangle Bra in Black for sizer

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