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Sits low on the hip and shows off some cheek :) [MK S]
 MK, shown here, is a size 26 jean, wearing a size 1 [MK S]
Complete the set with our Sieve Non-Wire Bra in Slate [MK S]
  • Sits low on the hip and shows off some cheek :) [MK S]
  •  MK, shown here, is a size 26 jean, wearing a size 1 [MK S]
  • Complete the set with our Sieve Non-Wire Bra in Slate [MK S]
Sieve Brief in Slate Sieve Brief in Slate Sieve Brief in Slate

Sieve Brief in Slate

Rated 4.4 out of 5
7 Reviews
Ultra low rise. Honeycomb micromesh.
Sieve fan? Meet your matching bottom and feel all sorts of pulled together.  

Free shipping over $75. Easy Returns.

Fit

  • Size Chart
  • Sizing Breakdown...
    XS fits dress sizes 0-2
    S fits dress sizes 2-4
    M fits dress sizes 6-8
    L fits dress sizes 10-12
    XL fits dress sizes 12-14
  • Use this as a guide. If you prefer a looser fit, we recommend sizing up

Fabric + Care

  • Size Chart
  • Belgian power micromesh is subtly sheer
  • Steely blue-grey tone
  • 74% Polyamide (Nylon) 26% Elastane (Spandex)
  • 100% Cotton gusset lining
  • Wash on delicates/cold, tumble dry low

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

“Negative Underwear was founded with three words in mind: minimal, considered, and uncomplicated. That's exactly what its bras are."  

I'm obsessed with your underwear - the only thing I want to wear since I bought them. They're super comfortable and still feel so sexy.” 
Hayley, 34D + Medium

“The result is four simple styles produced with premium-­quality cotton and nylon elastane sourced from Belgium and the U.S.”

average rating 4.4 out of 5
Based on 7 reviews
  • 5 Stars
    4 Reviews
  • 4 Stars
    2 Reviews
  • 3 Stars
    1 Review
  • 2 Stars
    0 Reviews
  • 1 Star
    0 Reviews
100% 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
7 Reviews
Reviewed by Vanessa B.
Verified Buyer
I recommend this product
Size Purchased
XL
How it Fits
A Little Small
Height
5'5"
Age
55 - 64
Jean Size
  • 30
  • 10
  • 8
  • 31
Rated 5 out of 5
Review posted

Beautiful practical comfortable underwear...as it should be!

Love my Sieve Triangle bra and panties! And Customer Service were very helpful when I had to return and go up a size. I'm a pretty standard size 36C but I found the band a bit too tight for all day comfort and ended up with their size 4 or XL. Now I can wear it all day :)

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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 Alanna H.
Verified Buyer
I recommend this product
Size Purchased
M
How it Fits
Runs Big
Height
5'6"
Age
25 - 34
Jean Size
  • 27
Rated 3 out of 5
Review posted

wrong size

seems great, but i got the wrong size, passed it on to someone who loves it :)

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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 5 out of 5
Comfort
Rated 3 out of 5
Was this helpful?
Reviewed by Angel H.
Verified Buyer
I recommend this product
Size Purchased
S
How it Fits
True to Size
Height
5'3"
Age
35 - 44
Jean Size
  • 26
Rated 5 out of 5
Review posted

Love it!

The material is great and the fit is great... I will definitely be purchasing another set. I love the color... Wish there were more options.

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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?