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A triangle bra and low rise thong in our signature micromesh
Triangle cut is low coverage at the front and sides
Moon is a pale silvery grey tone
Adjustable hook & eye and strap sliders in the back
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Sieve Triangle Bra

Rated 4.5 out of 5
Based on 314 reviews

Surprising support. Deep v neckline.

Our signature Sieve mesh in a lower coverage triangle cut.
 

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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 :)
  • Adjustable straps and hook & eye closure in the back
  • *Note, our Sieve Triangle Bra is an intentionally lower coverage in both the cups and the sides. Wide plush elastic band is extremely adaptable.

Fabric + Care

  • Size Chart
  • Made from a sheer Belgian power micromesh — nipples are visible
  • A soft silvery cloud lunar dust baby bunny ears 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 Brief in Moon Sieve Brief in Moon Sieve Brief in Moon $35 +
Rated 4.7 out of 5
Based on 53 reviews
Sieve High-Waist Brief in Moon Sieve High-Waist Brief in Moon Sieve High-Waist Brief in Moon $45
Rated 4.5 out of 5
Based on 26 reviews
Whipped High Rise in Moon Whipped High Rise in Moon Whipped High Rise in Moon $45 +
Rated 4.7 out of 5
Based on 220 reviews
Whipped Boy Short in Moon Whipped Boy Short in Moon Whipped Boy Short in Moon $45 +
Rated 4.6 out of 5
Based on 148 reviews
Write a Review
average rating 4.5 out of 5
Based on 314 reviews
  • 5 Stars
    221 Reviews
  • 4 Stars
    44 Reviews
  • 3 Stars
    37 Reviews
  • 2 Stars
    8 Reviews
  • 1 Star
    4 Reviews
91% of reviewers would recommend this product to a friend
314 Reviews
Reviewed by Erin
Verified Buyer
Sieve Triangle Bra in Buff + Black
Reviewing
Sieve Triangle Bra in Buff + Black
I recommend this product
Rated 5 out of 5
Review posted

How is this bra so comfy and yet so flirty?

I only added this one to my cart on a whim, and I'm so glad I did! I have a small chest and wasn't sure how an unlined bra was going to look. But this bra provides just enough lift be flattering, even with a deep neckline like my faux wrap dresses. The fact that it's sheer feels... decadent. My spouse enthusiastically approves as well.

One thing to note: I had to size up. The size chart said that as a 36B I should choose a 3, but the 3 was too snug in the band and led to the dreaded back wings. The 4 fits perfectly.

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Reviewed by B.
Verified Buyer
Sieve Triangle Bra in Buff
Reviewing
Sieve Triangle Bra in Buff
I recommend this product
Rated 4 out of 5
Review posted

In between, but still great design

I'm in between sizes: 36 band, but AA or AAA cup. A size 36 band means the cup is wrinkly. Going with the 34 fits great in the cup but i need two extenders to make the band comfortable. Overall, it's still a great design. The absolute perfect thing for a hot day. It feels like you're almost going braless.

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Reviewed by Therese H.
Verified Buyer
Sieve Triangle Bra in Coral
Reviewing
Sieve Triangle Bra in Coral
I recommend this product
Rated 5 out of 5
Review posted

Sexy and comfy !!

So comfortable you don't even realize you're wearing it. Totally worth every penny. You get what you pay for. I'm addicted to the Negative brand.

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Non-Wire Bra Sizing

Non-Wire Bra Sizing Size Chart

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

@negativeunderwear