24/7® Classic Second Skin Unlined Bra, Black - Thirdlove - Nylon/Spandex,modelHHH 24/7® Classic Second Skin Unlined Bra, Black - Thirdlove - Nylon/Spandex,modelHHH 24/7® Classic Second Skin Unlined Bra, Black - Thirdlove - Nylon/Spandex,modelHHH 24/7® Classic Second Skin Unlined Bra, Black - Thirdlove - Nylon/Spandex,modelHHH 24/7® Classic Second Skin Unlined Bra 24/7® Second Skin Unlined Bra, Black - Thirdlove - Nylon/Spandex
24/7® Classic Second Skin Unlined Bra, Black - Thirdlove - Nylon/Spandex,modelHHH

Need help with sizing? Take the Fit Quiz

24/7® Classic Second Skin Unlined Bra, Black - Thirdlove - Nylon/Spandex,modelHHH 24/7® Classic Second Skin Unlined Bra, Black - Thirdlove - Nylon/Spandex,modelHHH 24/7® Classic Second Skin Unlined Bra, Black - Thirdlove - Nylon/Spandex,modelHHH 24/7® Classic Second Skin Unlined Bra, Black - Thirdlove - Nylon/Spandex,modelHHH 24/7® Classic Second Skin Unlined Bra 24/7® Second Skin Unlined Bra, Black - Thirdlove - Nylon/Spandex

24/7® Classic Second Skin Unlined

$59

5,945 Reviews

Rated 4.4 out of 5 stars from 5,945 reviews

24/7® Classic Second Skin Unlined

$59

5,945 Reviews

Rated 4.4 out of 5 stars from 5,945 reviews

Band

Size guide

Cup

Size

Size guide
Product Details

This unlined bra gives you underwire support and zero bulk under everything you wear. What is an unlined bra? It's a bra with no foam or padding in the cups, so the band and wire do the supporting while your own shape shows through.

  • Foam-free double-layer cups: Your natural silhouette comes through with no padding added.
  • Cool, silky microfiber: The fabric feels smooth and cool against your skin.
  • Flexible, poke-free underwire: You get separation and support without a wire jabbing you.
  • No-show double-layer back: You get a clean line across your back under fitted tops.
  • Scratch-free tagless label: Nothing rubs or itches between your shoulder blades.
  • Exclusive half cup sizes: You get a closer fit when you fall between full cup sizes.

Weighing an unlined bra vs. lined styles for T-shirts and fitted knits? This unlined underwire bra gives you a seamless look for everyday wear, year-round.
Size & Fit
  • True to size
  • Best for B cups & up
  • More coverage
  • Choose from bands 32–44 and cups A through H (DDDDD), including half cups A½ through E½. If you're shopping unlined bras for large breasts, this one runs true to size, fits best on B cups and up, and gives more coverage. Wear your usual Thirdlove size, or take the Fit Quiz in under 2 minutes.
Bra Size Calculator & Chart

Thirdlove offers over 60 bra sizes from 32 to 44 band and bra cup sizes from AA to H cup, including our exclusive half cup sizes. Using your current bra size as a starting point, you can refer to the bra cup size chart below to refine your fit.

Bra Size Calculator & Chart

How To Use The Bra Size Chart

When using the chart to find your bra size, keep in mind:

  • The band size increases as you move from left to right. Move left or right within the row if your band doesn't fit.
  • The cup size increases as you move from top to bottom on the chart. Move up or down the columns if your cups don't fit. In between cup sizes? Go up or down a half-cup! And keep in mind if you want styles that are full coverage or not!
  • Bra sizes that share a row are sister sizes, meaning they share the same cup volume (though they have different cup letters). For example, at a glance they’re all just different bra sizes. However, the row with bra sizes 36C, 38B, and 40A have something in common: they all have the same cup volume but have different band sizes. The same goes for the row with bra sizes 38H, 40G, 42F, 44E, 46D, and 48C.
Bra Size Calculator & Chart

Measure snugly around your rib cage (underbust) and around the fullest part of your bust, in inches. Step 1 gives your band. For step 2, subtract your underbust from your bust and find the difference in your band's column. These are the sizes our Bra Size Calculator gives.

Step 1: Band size by underbust measurement (inches). Each range excludes its lower value and includes its upper value.
Underbust (in) Band size
24.9 – 28.5 30
28.5 – 30.5 32
30.5 – 32.5 34
32.5 – 34.5 36
34.5 – 36.5 38
36.5 – 38.5 40
38.5 – 40.5 42
40.5 – 42.5 44
Step 2: Bra size by band and by bust minus underbust (inches). Each range excludes its lower value and includes its upper value.
Bust − underbust (in) Band 30 Band 32 Band 34 Band 36 Band 38 Band 40 Band 42 Band 44
Up to 2.534AA
2.5 – 330B*32A*34AA*
3 – 3.530C32B34A
3.5 – 430C½32B½34A½
4 – 4.530D32C34B36A*
4.5 – 530D32C½34B½36A½
5 – 5.530E32D34C36B38A*
5.5 – 630E½32D½34C½36B½38A½
6 – 6.530F32E34D36C38B
6.5 – 730F32E½34D½36C½38B½
7 – 830G32F34E36D38C40B*
8 – 932G34F36E38D40C42B*
9 – 1034G36F38E40D42C44B*
10 – 1134H36G38F40E42D44C
11 – 1236H38G40F42E44D
12 – 1338H40G42F44E

* Also the result when the difference is exactly 2.5 in: 30B, 32A, 34AA; 4 in: 36A; 5 in: 38A; 7 in: 40B; 8 in: 42B; 9 in: 44B.

The calculator only gives a size for an underbust over 24.9 in, up to 42.5 in, with a difference of up to 13 in. Blank cells and measurements outside these ranges have no size in the calculator.

Bra Size Calculator & Chart
Fabric & Care
  • 76% nylon/24% Spandex
  • Machine wash in cold, lay flat to dry
  • Use a garment bag for machine wash
Shipping & Returns

Perfect fit promise: Exchanges free for 60 days for all eligible orders. Please try on the bra to ensure a good fit, making sure to leave the original tags attached. We only accept underwear in unworn condition, with original tags, in its unopened original polybag. Items marked final sale are not eligible for return or exchange. If something’s not right, we can help. Our Fit Experts are available via live chat, or email to answer any questions you might have.

Complete the Look

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What Our Customers Are Saying

  1. Elizabeth H.

    Rated 3 out of 5 stars

    I think better suited for smaller chests

    Its cute and soft but I think it because I have large breasts, they don't seems to sit right in the cups. It feels like there is extra fabric under my breasts if I pull the band where its supposed to be. But, if I place my breasts where they are typically comfortable the wire pops out from my skin. I think this bras is better suited for smaller chested ladies.

    Cup Size
    F
    Fit
    True to size
    Comfort
    Average

  2. Sera

    Rated 5 out of 5 stars

    Keep coming back

    The unlined are my favorite bras. I love that they feel supportive yet are thinner and seamless under clothes. While they do stretch out after a while all bras do so I feel like they last a decent amount of time since I wear them almost every day!

    Cup Size
    E
    Fit
    True to size
    Comfort
    Excellent

  3. Jennifer

    Rated 2 out of 5 stars

    Not for me

    It was an odd combination of a lot of thin, stretchy fabric that had no structure combined with the rigid underwire. I don't get why the extra fabric all the way up the front strap area. I was looking for something minimal but maybe if they had 1/2 the amount of fabric and just doubled it up for a bit of support, it would be useful.

    Cup Size
    C
    Comfort
    Fair

  4. QUINN P.

    Rated 5 out of 5 stars

    Best Everyday Bra ever

    The fabric is so soft and comfortable and the bra gives great support and shape. This is my new favorite bra for everyday wear.

    Cup Size
    F
    Fit
    True to size
    Comfort
    Excellent

  5. Alison K.

    Rated 5 out of 5 stars

    Superior comfort

    Fits well. Lightweight microfiber fabric feels breezy-comfortable. 3-hook & eye fastening and under arm bands that are on the broader side smooth my plump body nicely.

    Cup Size
    B
    Fit
    True to size
    Comfort
    Excellent

FAQs

Can you see nipples through an unlined bra?

It depends on the bra and the top you pair it with. The Second Skin has double-layer cups, which add coverage compared with a single-layer unlined cup. If you want more coverage under thin or light-colored tops, add Thirdlove's Breathable Silicone Solutions Nipple Covers ($29).

What's the difference between a lined and unlined bra?

A lined bra has foam or padding in the cups, which adds shape and volume. An unlined bra skips the foam, so you get a lighter feel and your own shape under clothes. This style keeps an underwire, so going unlined doesn't mean giving up structure.

What's the point of an unlined bra?

You get support without extra volume. It's a smart pick if you want a natural look under knits and tees, plus less material between you and your top. Here, cool, silky microfiber sits against your skin in place of foam.

Do unlined bras have wire, and is this one supportive for larger cups?

Some do and some don't, and this one has a flexible, poke-free underwire. The wire and band give you separation and smoothing support with no padding. It's designed for B cups and up, with sizes through H (DDDDD).

How do I find my size?

If you know your size in another Thirdlove bra, order that same size here. If you don't, take the Fit Quiz, which takes under 2 minutes. Half cups from A½ to E½ help if you're between cup sizes.

How do I wash it?

Machine wash it cold in a garment bag. Skip the dryer and lay it flat to dry instead.

Can I return or exchange it?

Yes, eligible orders are covered by the Perfect Fit Promise, with free exchanges for 60 days. Keep the tags attached to qualify. Some colors are final sale and can't be exchanged, so check before you order from black, taupe, rose dust, topaz, mocha, or pinot.

Which breast shapes does it suit?

It works especially well for asymmetric, athletic, round, side-set, and slender shapes. If you're asymmetric, half cup sizes give you more options for fitting your fuller side.