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MK, shown here, is a size 34D bra, wearing a size 3 [MK 34D]
Sieve Non-Wire Bra in Slate
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
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Sieve Non-Wire Bra

Rated 4.6 out of 5
1371 Reviews

Our best selling bra for a reason.

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

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
  • 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.
  • 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 $30 +
Rated 4.7 out of 5
86 Reviews
Silky Thong in Slate Silky Thong in Slate
Silky Thong in Slate $30 +
Rated 4.7 out of 5
75 Reviews
Silky Brief in Slate Silky Brief in Slate
Silky Brief in Slate $35 +
Rated 4.7 out of 5
98 Reviews
Sieve Brief in Slate Sieve Brief in Slate
Sieve Brief in Slate $35 +
Rated 4.4 out of 5
11 Reviews
Write a Review
average rating 4.6 out of 5
Based on 1371 reviews
  • 5 Stars
    1066 Reviews
  • 4 Stars
    149 Reviews
  • 3 Stars
    83 Reviews
  • 2 Stars
    44 Reviews
  • 1 Star
    29 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
1371 Reviews
Reviewed by Cj S.
Verified Buyer
Sieve Non-Wire Bra in Buff + Black
Reviewing
Sieve Non-Wire Bra in Buff + Black
I recommend this product
Size Purchased
2
How it Fits
True to Size
Age
45 - 54
Bra Size
34C
Rated 5 out of 5
Review posted

Super Deluxe

...and super pleased! One of my fave go-to's at the moment. I will definitely be buying more in different styles and colors!

Yay, Negative! Thank you for being top notch!

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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 Alyse
Verified Reviewer
Sieve Non-Wire Bra in Haze
Reviewing
Sieve Non-Wire Bra in Haze
I recommend this product
Size Purchased
2
How it Fits
Runs Small
Age
25 - 34
Bra Size
34D
Rated 3 out of 5
Review posted

Great bra but too tight!

I love the bra but it doesn’t fit. I’m a 34D and was suggested to get a “2” if I liked the band a little tighter and a 3 if I liked the band looser - I got a 2 because I liked it tighter but the *cups* are too small... it creates a line across my chest because I have breast tissue sticking pushing out above the cup. I wish I would’ve gone with a 3, but worry the band will be too loose. I also can’t return / exchange since I removed the tags.

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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 4 out of 5
Comfort
Rated 3 out of 5
Was this helpful?
Reviewed by cindy b.
Verified Buyer
Sieve Non-Wire Bra in Black
Reviewing
Sieve Non-Wire Bra in Black
I recommend this product
Size Purchased
S
How it Fits
True to Size
Age
65+
Bra Size
34C
Rated 5 out of 5
Review posted

Awesome!!!

This is my third set! Love the concept of comfort, transparency, and simplicity ❤️ Nothing else is like this product❤️❤️❤️

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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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