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MK, shown here, is a size 34D bra, wearing a size 3 [MK 34D]
Pairs perfectly with our Sieve High-Waist Brief in Slate [MK 34D]
4-row hook & eye closure allows for a more custom fit [MK 34D]
[MK 34D]
Sieve Non-Wire Bra in Slate
Sieve Non-Wire Bra in Slate
  • MK, shown here, is a size 34D bra, wearing a size 3 [MK 34D]
  • Pairs perfectly with our Sieve High-Waist Brief in Slate [MK 34D]
  • 4-row hook & eye closure allows for a more custom fit [MK 34D]
  • [MK 34D]
  • Sieve Non-Wire Bra in Slate
  • Sieve Non-Wire Bra in Slate
Sieve Non-Wire Bra in Slate Sieve Non-Wire Bra in Slate Sieve Non-Wire Bra in Slate Sieve Non-Wire Bra in Slate Sieve Non-Wire Bra in Slate Sieve Non-Wire Bra in Slate

Sieve Non-Wire Bra

Rated 4.7 out of 5
801 Reviews
Our best selling bra for a reason. 
Great shape and surprising support - no pad or wire included.

Free shipping over $75. Easy Returns.

Fit

  • Size Chart
  • Size Breakdown...
    0 fits bra sizes: 30A, 30B, 30C, 32A
    1 fits bra sizes: 30D, 32B, 32C, 34A, 34B
    2 fits bra sizes: 30DD, 32D, 32DD, 34C, 34D, 36A
    3 fits bra sizes: 34DD, 36B, 36C, 36D, 38B
    4 fits bra sizes: 36DD, 38C, 38D, 38DD
    5 fits bra sizes: 40B, 40C, 40D
  • 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)
  • Hand wash in cold water, dry flat

FAQ

  • All unworn items, with tags attached and in their original packaging are eligible for return or exchange within 21 days of placing your order.
  • 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

Non-Wire Bra Sizing

Size Chart

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

Pair it with ->

Just the right amount of cheek [Paula XS] [Paula XS]
Silky Brief in Slate $35 +
Rated 4.7 out of 5
53 Reviews
Anastasia is 5'9", jean size 26, wearing a size 1 [Anastasia S] Power mesh is the right amount of sheer [Anastasia S]
Sieve Thong in Slate $30 +
Rated 4.9 out of 5
14 Reviews
Silky Thong in Slate Silky Thong in Slate
Silky Thong in Slate $30 +
Rated 5.0 out of 5
4 Reviews
Write a Review
average rating 4.7 out of 5
Based on 801 reviews
  • 5 Stars
    640 Reviews
  • 4 Stars
    95 Reviews
  • 3 Stars
    46 Reviews
  • 2 Stars
    17 Reviews
  • 1 Star
    3 Reviews
94% of reviewers would recommend this product to a friend
Overall
Rated -1 on a scale of minus 2 to 2, where minus 2 is Loved it, 0 is Meh and 2 is Hated it
Quality
Rated 4 out of 5
Comfort
Rated 4 out of 5
801 Reviews
Reviewed by Eleanor N.
Verified Buyer
Sieve Non-Wire Bra in Black
Reviewing
Sieve Non-Wire Bra in Black
I recommend this product
Size Purchased
1
How it Fits
True to Size
Age
35 - 44
Bra Size
32B
Rated 5 out of 5
Review posted

Now wear this almost every day

I've been an underwire loyalist since high school, but four months of working from home convinced me that they're not actually that comfortable. This is almost imperceptible on, and just sexy enough that I don't feel like I've given up. I bought the 1 and probably could have sized down; I'm 5'5"/125 lbs and a small 34a/32b; this is just barely tight enough on the middle hook, with a little extra room in the cups.

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Overall
Rated -2 on a scale of minus 2 to 2, where minus 2 is Loved it, 0 is Meh and 2 is Hated it
Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Was this helpful?
Reviewed by LeAnne J.
Verified Buyer
Sieve Non-Wire Bra in Slate
Reviewing
Sieve Non-Wire Bra in Slate
I recommend this product
Size Purchased
1
How it Fits
True to Size
Age
55 - 64
Bra Size
34B
Rated 5 out of 5
Review posted

Great Bra

I like the support and comfort of this Bra !. Finally a great and comfortable Bra .👍

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Overall
Rated -2 on a scale of minus 2 to 2, where minus 2 is Loved it, 0 is Meh and 2 is Hated it
Quality
Rated 4 out of 5
Comfort
Rated 5 out of 5
Was this helpful?
Reviewed by Masha S.
Verified Buyer
Sieve Non-Wire Bra in Peach
Reviewing
Sieve Non-Wire Bra in Peach
I don't recommend this product
Size Purchased
2
How it Fits
A Little Small
Age
55 - 64
Bra Size
36B
Rated 4 out of 5
Review posted

it's OK

I did not find it to be anything special.

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Overall
Rated 0 on a scale of minus 2 to 2, where minus 2 is Loved it, 0 is Meh and 2 is Hated it
Quality
Rated 3 out of 5
Comfort
Rated 3 out of 5
Was this helpful?
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