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MK, shown here, is a size 34D bra, wearing a size 3 [MK 3]
Pairs perfectly with our Sieve High-Waist Brief in Slate [MK 3]
4-row hook & eye closure allows for a more custom fit [MK 3]
Sieve Non-Wire Bra in Slate
[Sabrina 2+]
[Sabrina 2+]
  • Thumbnail image #1 of Sieve Non-Wire Bra in Slate [MK 3]
  • Thumbnail image #2 of Sieve Non-Wire Bra in Slate [MK 3]
  • Thumbnail image #3 of Sieve Non-Wire Bra in Slate [MK 3]
  • Thumbnail image #4 of Sieve Non-Wire Bra in Slate
  • Thumbnail image #5 of Sieve Non-Wire Bra in Slate [Sabrina 2+]
  • Thumbnail image #6 of Sieve Non-Wire Bra in Slate [Sabrina 2+]
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Product photo #1 of Sieve Non-Wire Bra in Slate [MK 3] Product photo #2 of Sieve Non-Wire Bra in Slate [MK 3] Product photo #3 of Sieve Non-Wire Bra in Slate [MK 3] Product photo #4 of Sieve Non-Wire Bra in Slate Product photo #5 of Sieve Non-Wire Bra in Slate [Sabrina 2+] Product photo #6 of Sieve Non-Wire Bra in Slate [Sabrina 2+]

Sieve Non-Wire Bra

Rated 4.6 out of 5
Based on 2725 reviews

Our best selling bra for a reason.


Great shape and surprising support - no pad or wire included.
NEW

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Free shipping for the holidays. 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 :)
  • *Note, our Sieve Non-Wire doesn't have the same wide band as our Silky. As a result, it'll likely feel snug the first few wears. Don't fret — it'll stretch a bit with time.

Fabric + Care

  • Size Chart
  • Made from a sheer Belgian power micromesh — nipples are visible
  • Steely blue-grey tone
  • 74% Polyamide (Nylon) 26% Elastane (Spandex)
  • Wireless
  • Hand wash in cold water, 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 Thong in Slate Sieve Thong in Slate Sieve Thong in Slate $32 +
Silky Thong in Slate Silky Thong in Slate Silky Thong in Slate $30 +
Silky Brief in Slate Silky Brief in Slate Silky Brief in Slate $35 +
Sieve Brief in Slate Sieve Brief in Slate Sieve Brief in Slate $35 +
Write a Review
average rating 4.6 out of 5
Based on 2725 reviews
  • 5 Stars
    2084 Reviews
  • 4 Stars
    298 Reviews
  • 3 Stars
    172 Reviews
  • 2 Stars
    103 Reviews
  • 1 Star
    68 Reviews
90% of reviewers would recommend this product to a friend
Overall
Rated -1 on a scale of minus 2 to 2, where minus 2 is Hated it, 0 is Meh and 2 is Loved it
Quality
Rated 4 out of 5
Comfort
Rated 4 out of 5
2725 Reviews
Reviewed by Genevieve S.
Verified Buyer
Review posted
Sieve Non-Wire Bra in Black
Reviewing
Sieve Non-Wire Bra in Black
I recommend this product
Rated 5 out of 5
Size Purchased
5
How it Fits
True to Size
Age Range
45 - 54
Bra Size
40D

Perfect Bra

Unlike most bras that just don't stay in place or don't line up with where my breasts are, this one fits me just right. I no longer have to constantly adjust my straps and pull it down, and I'm not dying to take it off at the end of the day!

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Overall
Rated 2 on a scale of minus 2 to 2, where minus 2 is Hated it, 0 is Meh and 2 is Loved it
Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Was this helpful?
Reviewed by Alyssa
Review posted
Sieve Non-Wire Bra in Black
Reviewing
Sieve Non-Wire Bra in Black
I recommend this product
Rated 5 out of 5
Size Purchased
2+
How it Fits
True to Size
Age Range
25 - 34
Bra Size
Other

AMAZING

WOW. I was 100% skeptical about this bra but it is fantastic! I’m a 34G which is hard enough to find and I was sized for a 2+ which fits perfect! I’m ordering the 3 pack now.

I wanted a wireless, mesh, comfty bra that didn’t smoosh my boobs like a sports bra and didn’t make the sag like an old lady bra. This bra supports like a wired bra and is crazy comfortable. Negative is right because I don’t feel it at all. You will not regret this purchase!

My only thing is I wish all the styles came in a 2+, please get more styles in the bigger sizes!

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Overall
Rated 2 on a scale of minus 2 to 2, where minus 2 is Hated it, 0 is Meh and 2 is Loved it
Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Was this helpful?
Reviewed by Melissa H.
Verified Buyer
Review posted
Sieve Non-Wire Bra in Slate
Reviewing
Sieve Non-Wire Bra in Slate
I recommend this product
Rated 5 out of 5
Size Purchased
3
How it Fits
True to Size
Age Range
35 - 44
Bra Size
34C

Love the color

Love the fit and style

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Overall
Rated 2 on a scale of minus 2 to 2, where minus 2 is Hated it, 0 is Meh and 2 is Loved it
Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Was this helpful?

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

@negativeunderwear