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[MK 1]
[MK 1]
[MK 1]
[Hannah 4+]
[Hannah 4+]
[Hannah 4+]
  • Thumbnail image #1 of Sieve Non-Wire Bra in Black, worn by MK, size 1
  • Thumbnail image #2 of Sieve Non-Wire Bra in Black, worn by MK, size 1
  • Thumbnail image #3 of Sieve Non-Wire Bra in Black, worn by MK, size 1
  • Thumbnail image #4 of Sieve Non-Wire Bra in Black, worn by Hannah, size 4+
  • Thumbnail image #5 of Sieve Non-Wire Bra in Black, worn by Hannah, size 4+
  • Thumbnail image #6 of Sieve Non-Wire Bra in Black, worn by Hannah, size 4+
Product photo #1 of Sieve Non-Wire Bra in Black, worn by MK, size 1 Product photo #2 of Sieve Non-Wire Bra in Black, worn by MK, size 1 Product photo #3 of Sieve Non-Wire Bra in Black, worn by MK, size 1 Product photo #4 of Sieve Non-Wire Bra in Black, worn by Hannah, size 4+ Product photo #5 of Sieve Non-Wire Bra in Black, worn by Hannah, size 4+ Product photo #6 of Sieve Non-Wire Bra in Black, worn by Hannah, size 4+

Sieve Non-Wire Bra in Black

Rated 4.6 out of 5
1258 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
  • 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.
  • 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
average rating 4.6 out of 5
Based on 1258 reviews
  • 5 Stars
    983 Reviews
  • 4 Stars
    136 Reviews
  • 3 Stars
    74 Reviews
  • 2 Stars
    40 Reviews
  • 1 Star
    25 Reviews
91% 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
1258 Reviews
Reviewed by Rebecca K.
Verified Buyer
I recommend this product
Size Purchased
1
How it Fits
True to Size
Age
18 - 24
Bra Size
32DDD/F
Rated 5 out of 5
Review posted

Love this!!

It’s so comfy! It’s like a fancier version of my other fav comfy lounging bras. So great! Unfortunately I wore it a ton for a little bit and then somehow I misplaced it 🤔 I’m desperate to figure out where it got to hahaha. I purchased the 1+ size but that’s not an option on the size list for some reason

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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 4 out of 5
Was this helpful?
Reviewed by Alexandra de A.
Verified Buyer
I recommend this product
Size Purchased
1
How it Fits
True to Size
Age
35 - 44
Bra Size
34A
Rated 5 out of 5
Review posted

First bra purchased after breastfeeding for years

The quality is amazing and the fit is great. I want to try another style as I do feel it could be a bit more sexy and would like a more deep cut in the center.

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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 4 out of 5
Was this helpful?
Reviewed by Brandi D.
Verified Buyer
I recommend this product
Size Purchased
4
How it Fits
True to Size
Age
45 - 54
Bra Size
36DD/E
Rated 5 out of 5
Review posted

Bra of My Dreams

This bra is well made and so comfortable! I immediately ordered two more!

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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?