Your cart

International Shipping now available!

Free U.S. Shipping on orders over $100, Easy Returns

Buy more, save money
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+]
Buy more, save money
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 2627 reviews

Our best selling bra for a reason.


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

Buy more and save $

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
  • Steely blue-grey tone
  • 74% Polyamide (Nylon) 26% Elastane (Spandex)
  • Hand wash in cold water, dry flat

FAQ

  • Price slashed, Annual Sale items with a red SALE tag are final sale. Full priced items and packs purchased with the 15% off discount are eligible for refund, credit or exchange. For more info on our sale policies ->
  • 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 2627 reviews
  • 5 Stars
    2008 Reviews
  • 4 Stars
    288 Reviews
  • 3 Stars
    171 Reviews
  • 2 Stars
    97 Reviews
  • 1 Star
    63 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
2627 Reviews
Reviewed by Shannon E.
Verified Buyer
Review posted
Sieve Non-Wire Bra in Black and in Buff (2 Pack)
Reviewing
Sieve Non-Wire Bra in Black and in Buff (2 Pack)
I recommend this product
Rated 5 out of 5
Size Purchased
1
How it Fits
True to Size
Age Range
35 - 44
Bra Size
34B

Best Bralette on the Market

I’ve tried bralettes from nearly all of the top brands, and this one outperforms… by a landslide. The sizing is accurate, it’s super comfortable, and it looks great with form-fitting tops. It doesn’t get much better than that.

Loading...
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 Elizabeth P.
Verified Buyer
Review posted
Sieve Non-Wire Bra in Black
Reviewing
Sieve Non-Wire Bra in Black
I don't recommend this product
Rated 2 out of 5
Size Purchased
1
How it Fits
Runs Small
Age Range
25 - 34
Bra Size
34B

Bralette too tight

I followed the sizing chart but ended up with a bra that was too tight. Order up!

Loading...
Overall
Rated 0 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 2 out of 5
Was this helpful?
Reviewed by Jessica C.
Verified Buyer
Review posted
Sieve Non-Wire Bra in Haze
Reviewing
Sieve Non-Wire Bra in Haze
I recommend this product
Rated 5 out of 5
Size Purchased
3
How it Fits
A Little Small
Age Range
45 - 54
Bra Size
36C

amazing!

Feels so light and airy! I love it

Loading...
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