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[MK 32C]
Honeycomb mesh creates a flattering shape and support [MK 32C]
Hook & eye closure with adjustable straps for sizing variation [MK 32C]
[MK 32C]
  • [MK 32C]
  • Honeycomb mesh creates a flattering shape and support [MK 32C]
  • Hook & eye closure with adjustable straps for sizing variation [MK 32C]
  • [MK 32C]
Sieve Non-Wire Bra in Black Sieve Non-Wire Bra in Black Sieve Non-Wire Bra in Black Sieve Non-Wire Bra in Black

Sieve Non-Wire Bra

Rated 4.7 out of 5
764 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
  • 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

“In a world of push-ups and pink, Negative goes back to basics with a focus on essentials - no itchy lace, no pesky bows."

“This bra is both comfortable and sexy - it's nice to see attention paid to a soft, supportive underband (the root of a bra, after all).” 

"I LOVE MY BRA. Seriously it’s amazing. I rave about the brand to all my girlfriends. Cant wait to buy more + get rid of the other crap.” 
Catie, 32D + Small

Pair it with ->

Pliable elastic waist band won't dig or roll [Nicola XS] Minimal cut is invisible under clothes [Nicola XS]
Silky Thong in Black $30 +
Rated 4.9 out of 5
46 Reviews
Only a few left!
Barely there leg elastic is seamless under jeans [MK S] Silky thin nylon fabric is subtly sheer - in a good way [MK S]
Silky Brief in Black $35 +
Rated 4.7 out of 5
52 Reviews
Drop-needle stitch creates a subtle, vertical stripe effect [MK S] Will you regret not buying the matching bottom? Probably, yes. [MK S]
Whipped A-Top in Black $70
Rated 5.0 out of 5
27 Reviews
Drop-needle stitch gives textural intrigue [Brittney XL] Styled here w our Whipped Bra Top [Brittney XL]
Whipped Boy Short in Black $45
Rated 4.7 out of 5
33 Reviews
Write a Review
average rating 4.7 out of 5
Based on 764 reviews
  • 5 Stars
    611 Reviews
  • 4 Stars
    92 Reviews
  • 3 Stars
    43 Reviews
  • 2 Stars
    15 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
764 Reviews
Reviewed by Jess C.
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
30A
Rated 5 out of 5
Review posted

tiny boobs finally feel sexy

this is the bra my "can't even fill an A cup" boobs have been waiting for... great fit, substantial fabric and looks sexy all while being extremely comfortable. I have replaced every crap bra that was in my drawer with these and love how they now offer the 2-packs at a discount. *for reference I'm 5'9, athletic build/got a booty but slim up top. 30A and I ordered this bra in a 1 the first round, and while they fit and are comfortable, ordered a few more in a size 0 and they are a perfect fit! I'm a convert, and I hope they make this bra forever.

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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 1 out of 5
Comfort
Rated 1 out of 5
Was this helpful?
Reviewed by Jess C.
Verified Buyer
Sieve Non-Wire Bra in Buff
Reviewing
Sieve Non-Wire Bra in Buff
I recommend this product
Size Purchased
1
How it Fits
True to Size
Age
35 - 44
Bra Size
30A
Rated 5 out of 5
Review posted

best bra for small boobs

This is the most comfortable and sexy bra I have found for my small chest. I don't like underwire, padding, frills and this fits the bill to a T. Sometimes it's hard for me to feel sexy in any of the bras made for such tiny boobs, and I totally feel sexy in this one. It fits perfectly and would still fit great if I were a little smaller or larger-chested. The fabric feels substantial and keeps it's shape. I have taken every bra out of my lingerie drawer and replaced it with these. Done and done. *For reference, I'm 5'9, 137 lbs, 30A (though usually I can't fill an A cup that is "shaped" or underwire).

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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 1 out of 5
Comfort
Rated 1 out of 5
Was this helpful?
Reviewed by Nicola M.
Verified Buyer
Sieve Non-Wire Bra in Black
Reviewing
Sieve Non-Wire Bra in Black
I recommend this product
Size Purchased
4
How it Fits
True to Size
Age
25 - 34
Bra Size
38D
Rated 5 out of 5
Review posted

Love this bra!

I ordered the Sieve Non-Wire Bra in black after purchasing it in peach a few months ago. I sized up this time since the last one was a bit snug, and this one fits perfectly and is so comfortable! The design is also super cute and I love the mesh fabric. I want this bra in every color!

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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?
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