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Product photo #1 of Sieve Non-Wire Bra in Black [MK 1] Product photo #2 of Sieve Non-Wire Bra in Black [MK 1] Product photo #3 of Sieve Non-Wire Bra in Black [MK 1] Product photo #4 of Sieve Non-Wire Bra in Black [MK 1] Product photo #5 of Sieve Non-Wire Bra in Black [Hannah 4+] Product photo #6 of Sieve Non-Wire Bra in Black [Hannah 4+] Product photo #7 of Sieve Non-Wire Bra in Black [Hannah 4+] Product photo #8 of Sieve Non-Wire Bra in Black [Hannah 4+]

Sieve Non-Wire Bra

Rated 4.6 out of 5
1623 Reviews

Our best selling bra for a reason.


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

Free shipping 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 :)
  • *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

Buy the set ->

Sieve Non-Wire Bra in Black Sieve Non-Wire Bra in Black (alternate view)
Sieve Non-Wire Bra in Black
Sieve Thong in Black Sieve Thong in Black (alternate view)
Sieve Thong in Black
Write a Review
average rating 4.6 out of 5
Based on 1623 reviews
  • 5 Stars
    1246 Reviews
  • 4 Stars
    180 Reviews
  • 3 Stars
    102 Reviews
  • 2 Stars
    56 Reviews
  • 1 Star
    39 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 Loved it, 0 is Meh and 2 is Hated it
Quality
Rated 4 out of 5
Comfort
Rated 4 out of 5
1623 Reviews
Reviewed by Sara G.
Verified Buyer
Sieve Non-Wire Bra in Black
Reviewing
Sieve Non-Wire Bra in Black
I don't recommend this product
Size Purchased
2
How it Fits
A Little Small
Age
25 - 34
Bra Size
34D
Rated 2 out of 5
Review posted

Falling out the top

I've been wanting this bra for over a year from the Instagram ads. I have something super similar, and needed some more comfy bras for WFH. I ordered a Black and Peach in a size 2 (I'm normally a size 34D) as suggested by the calculator. While the bras are so cute and seem to fit well enough, every time I lean over, my nipples pop out the top and fall out. I'm not one to care about a supportive bra, but It's frustrating when my boobs are literally falling out of the top of the bra...

I'm not sure if it's the sizing or if it's the shape of the bra, but BEWARE.

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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 1 out of 5
Comfort
Rated 2 out of 5
Was this helpful?
Reviewed by Sarah M.
Verified Buyer
Sieve Non-Wire Bra in Haze
Reviewing
Sieve Non-Wire Bra in Haze
I recommend this product
Size Purchased
3
How it Fits
True to Size
Age
45 - 54
Bra Size
34D
Rated 5 out of 5
Review posted

I love all the sieve bras!

I have these bras in all the colors, haven't worn anything else in a couple years now! The sieve material is perfect for allowing my skin to breathe, and it has a little more hold than just smooth stretchy fabric. Please keep making them!

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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 Natalie R.
Verified Buyer
Sieve Non-Wire Bra in Haze + Black
Reviewing
Sieve Non-Wire Bra in Haze + Black
I recommend this product
Size Purchased
36DD
How it Fits
True to Size
Age
35 - 44
Bra Size
38DD/E
Rated 5 out of 5
Review posted

Extremely comfortable

Soft, well made and very comfortable

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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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Non-Wire Bra Sizing

Size Chart

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

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