13 products
13 products
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Bras + Underwear Bras Underwire
None of the padding. All the support.
Airy light and surprisingly strong — it’s not impossible, we made it.
*411*
- Underwire bra with max comfort
- Velvety plush elastic underband
- Heat transferred care label = no itchy tags
*FABRIC*
- 74% Polyamide (Nylon) 26% Elastane (Spandex)
- Espresso is rich freshly-ground coffee deep mahogany shade
- Made from a sheer Belgian power micromesh - nipples are visible
- Hand wash in warm water, dry flat
None of the padding. All the support.
Airy light and surprisingly strong — it’s not impossible, we made it.
*411*
- Made from a sheer Belgian power micromesh — nipples are visible
- Underwire bra with max comfort
- Velvety plush elastic underband
- Heat transferred care label = no itchy tags
*FABRIC*
- Sheer Belgian power micromesh is surprisingly supportive
- Unpadded and unlined — nipples can show depending on the person or the shirt
- 74% Polyamide (Nylon) 26% Elastane (Spandex)
- A caramel-y sunrise affogato desert sands tone
- Hand wash in warm water, dry flat
None of the padding. All the support.
Airy light and surprisingly strong — it’s not impossible, we made it.
*411*
- Made from a sheer Belgian power micromesh — nipples are visible
- Underwire bra with max comfort
- Velvety plush elastic underband
- Heat transferred care label = no itchy tags
Complete the Set
Pair the Sieve Demi Bra with our Sieve Thong or Sieve String Thong for a coordinated everyday set. Crafted from the same sheer Belgian power micromesh, each piece offers lightweight breathability, a smooth, flexible fit, and barely-there comfort.
Underwire, Unlined, Unapologetic
The Sieve Demi Bra brings structured underwire support to our signature Sieve Collection, with unlined, unpadded demi cups for a natural shape. Crafted from sheer Belgian power micromesh (74% nylon, 26% elastane), certified to OEKO-TEX® STANDARD 100, the fabric is transparent, so nipples are visible. A velvety plush elastic underband and tagless heat-transfer care label provide added comfort. Rated 4.7 stars by 1,618 reviewers, with one calling it “your everyday bra but better.” Hand wash warm and dry flat.
Part of the Sieve Collection
The Sieve Demi Bra is part of our signature Sieve Collection, featuring sheer Belgian power micromesh designed for lightweight comfort and a barely-there feel. Explore the full collection, including the Sieve Non-Wire Bra, Sieve Triangle Bra, Sieve Bra Top, and Sieve Cutout Bra, each offering a different fit and level of support. Complete your everyday essentials with the coordinating Sieve Thong.
FAQs
Q: Is the Sieve Demi Bra underwire or wireless?
A: The Sieve Demi Bra features underwire support with unlined, unpadded demi cups for a natural shape and gentle lift. Its lightweight Belgian power micromesh provides a breathable, comfortable fit.
Q: How is band/cup sizing different from Negative's 0–5 non-wire sizing?
A: The Sieve Demi Bra uses traditional bra sizing, with separate band and cup measurements for a more precise fit. Our non-wire styles use a numeric 0–5 sizing system, including extended cup options. Refer to our size chart to find your best fit.
Q: Can I machine wash this bra?
A: We recommend hand washing the Sieve Demi Bra in warm water and laying it flat to dry. Machine washing is not recommended, as gentle care helps preserve the delicate micromesh fabric and fit.
Q: Is the Sieve Demi Bra see-through?
A: Yes, the Sieve Demi Bra is made from sheer Belgian power micromesh with unlined, unpadded cups, so nipples are visible. The lightweight, breathable fabric offers a barely-there feel with comfortable underwire support.
Q: Is this bra padded or lined?
A: No, the Sieve Demi Bra features unlined, unpadded demi cups made from sheer Belgian power micromesh. This lightweight fabric provides a natural shape and breathable comfort, with nipples visible through the material.
*FABRIC*
- 74% Polyamide (Nylon) 26% Elastane (Spandex)
- Hand wash in warm water, dry flat
None of the padding. All the support.
Airy light and surprisingly strong — it’s not impossible, we made it.
*411*
- Underwire bra with max comfort
- Velvety plush elastic underband
- Heat transferred care label = no itchy tags
*FABRIC*
- 74% Polyamide (Nylon) 26% Elastane (Spandex)
- Babe is a pink lemonade bubblegum tone
- Made from a sheer Belgian power micromesh - nipples are visible
- Hand wash in warm water, dry flat
The perfect strapless bra. High gloss fabric.
A flattering, supportive, and comfortable strapless bra that can be worn 18 different ways, under absolutely anything.
*411*
- Multiway adjustable straps can be worn 18 ways
- Spandex grip lining to keep it in place
- Thin memory foam pads mold to your body
- 4 row hook and eye
- Underwire bra with max comfort
- No nipple visibility
*FABRIC*
- 77% Polyamide (Nylon) 23% Elastane
- Buff is a caramel-y sunrise desert sands affogato tone
- Certified Safe: OEKO-TEX® STANDARD 100 #HK020 196895 by TESTEX AG
- Hand wash in warm water, hang dry
- *Note, avoid squeezing/wringing out cups (they’re memory foam, after all!)
The perfect strapless bra. High gloss fabric.
A flattering, supportive, and comfortable strapless bra that can be worn 18 different ways, under absolutely anything.
*411*
- Multiway adjustable straps can be worn 18 ways
- Spandex grip lining to keep it in place
- Thin memory foam pads mold to your body
- 4 row hook and eye
- Underwire bra with max comfort
- No nipple visibility
*FABRIC*
- 77% Polyamide (Nylon) 23% Elastane
- Black is a raven deep noir tone
- Certified Safe: OEKO-TEX® STANDARD 100 #HK020 196895 by TESTEX AG
- Hand wash in warm water, hang dry
- *Note, avoid squeezing/wringing out cups (they’re memory foam, after all!)
Smooth and seamless. Thin memory foam padding.
Rated “Best T-Shirt Bra” by New York Magazine. This underwire bra ticks all best-in-class t-shirt bra boxes but still feels beautiful and sophisticated.
*411*
- Full coverage + significant support
- Thin memory foam pads mold to your body
- Underwire bra with max comfort
- No nipple visibility
*FABRIC*
- 74% Polyamide (Nylon) 26% Elastane
- A caramel-y sunrise desert sands affogato tone
- Hand wash in cold water, dry flat
- *Note, avoid squeezing/wringing out cups (they’re memory foam, after all!)
Smooth and seamless. Thin memory foam padding.
Rated “Best T-Shirt Bra” by New York Magazine. This underwire bra ticks all the best-in-class t-shirt bra boxes but still feels beautiful and sophisticated.
*411*
- Full coverage + significant support
- Thin memory foam pads mold to your body
- Underwire bra with max comfort
- No nipple visibility
*FABRIC*
- 74% Polyamide (Nylon) 26% Elastane
- Hand wash in cold water, dry flat
- *Note, avoid squeezing/wringing out cups (they’re memory foam, after all!)
Sheer support. Balconette cut.
Brought back an old favorite. This bra is the best of all worlds: supportive, sexy, functional, flattering.
*411*
- Made from a sheer Belgian power micromesh — nipples are visible
- Underwire bra with max comfort
- Velvety plush elastic underband
- Open mesh trim detail at top cups
- Heat transferred care label = no itchy tags
- If you prefer more coverage, you may want to size up the cup
*FABRIC*
- 74% Polyamide (Nylon) 26% Elastane (Spandex)
- Hand wash in cold water, dry flat
Surprisingly supportive. Balconette cut.
Brought back an old favorite. This bra is the best of all words: supportive, sexy, functional, flattering.
*411*
- Made from a sheer Belgian power micromesh — nipples are visible
- Underwire bra with max comfort
- Velvety plush elastic underband
- Open mesh trim detail at top cups
- Heat transferred care label = no itchy tags
- If you prefer more coverage, you may want to size up the cup
*FABRIC*
- 74% Polyamide (Nylon) 26% Elastane (Spandex)
- Hand wash in cold water, dry flat
A little wire. A lot of polish.
Our most minimal, smoothing underwire bra. An ultra- flattering, low cut bra with a partial wire for flexible support.
*411*
- A plunging, low neckline meets an ultra-thin bottom band with a flexible, curved underwire.
- Luxurious Glacé fabric hugs you for a smoothing, second skin fit without padding.
- Ideal for those who want the support / shaping of a wire without any restriction.
- Recommended for both small and large cup sizes.
- Sizes 34DD, 36D-36DD & 38C-38DD are designed with an invisible, internal sling for extra support.
*FABRIC*
- Ultra-luxe Belgian stretch nylon with the glossy feel and sheen of silk
- A caramel-y sunrise desert sands affogato tone
- Double layered for extra smooth coverage in the front
- Molded for a clean finish
- 77% Nylon / 23% Elastane
- Hand wash warm, hang dry, wear often
A little wire. A lot of polish.
Our most minimal, smoothing underwire bra. An ultra- flattering, low cut bra with a partial wire for flexible support.
*411*
- A plunging, low neckline meets an ultra-thin bottom band with a flexible, curved underwire.
- Luxurious Glacé fabric hugs you for a smoothing, second skin fit without padding.
- Ideal for those who want the support / shaping of a wire without any restriction.
- Recommended for both small and large cup sizes.
- Sizes 34DD, 36D-36DD & 38C-38DD are designed with an invisible, internal sling for extra support.
*FABRIC*
- Ultra-luxe Belgian stretch nylon with the glossy feel and sheen of silk
- A deep black tone
- Double layered for extra smooth coverage in the front
- Molded for a clean finish
- 77% Nylon / 23% Elastane
- Hand wash warm, hang dry, wear often
None of the padding. All the support.
Airy light and surprisingly strong — it’s not impossible, we made it.
*411*
- Underwire bra with max comfort
- Velvety plush elastic underband
- Heat transferred care label = no itchy tags
*FABRIC*
- 74% Polyamide (Nylon) 26% Elastane (Spandex)
- Shell is a rose-tinted cherry blossom blush pink tone
- Made from a sheer Belgian power micromesh - nipples are visible
- Hand wash in warm water, dry flat