SIA Nude Seamless Backless Bodysuit with a Pleat-Free Cup and Full Briefs
Orders placed during our seasonal break (6 Nov – 14 Dec) will ship after 15 December.
Description
SIA Nude is my most seamless full-brief bodysuit style — the one I usually recommend for square, round or high necklines when your dress fabric is unforgiving and you want everything to stay hidden underneath.
The moulded cups are unpadded and seamless, so they won't show through satin, silk or bias-cut fabric. In the correct size, they support your bust without adding volume, while covering your nipples. There’s also no bra back band. I built the bust support into the garment itself so your back stays completely exposed.
The fabric I use for the bodysuit, smooths over anything that might otherwise show under a slinky dress — including the belly button — and the full coverage brief has laser-cut edges that won’t roll, wrinkle or ride up as you move. Lastly I added a hook-and-eye closure at the gusset for bathroom convenience.
Handmade, to order in my London studio.
* Product and fit guidance provided by Ender Legard founder Asia Smaga, based on her customer consultations.
- Cup: Underwired, seamless balconette / T-shirt style — no pleats;
- Cup construction: 1mm moulded foam for structure and nipple coverage; no added volume-enhancing padding.
- Centre depth: Medium
- Back: Ultra-low; no bra back band (UK Patent GB2548925B)
- Straps: Adjustable fabric shoulder straps included. Interchangeable with clear silicone, spaghetti or longer fabric straps (alternative straps sold separately). 3 strap configurations:
Standard: Wear with the included adjustable fabric straps.
Racerback: Use the included straps with a short converter strap (sold separately).
Cross-over: Use longer fabric straps (sold separately). - Brief: Full brief, with no front or side seams, laser-cut edges, hook & eye gusset closure.
- Shaping: Medium to high
Not sure which size to choose? Use my 3-step sizing guide to match your UK bra size with your waist, hip and body measurements, or contact me for personalised sizing advice.
Longer torso? SIA's sister bodysuit, FRANKIE incorporates a tanga brief construction that can offer more body-length flexibility than full briefs.
- Fabric: OEKO-TEX® STANDARD 100-certified European power mesh; 65% polyamide (PA), 35% LYCRA® elastane.
- Care: Hand wash in mild detergent; Lay flat to dry. Do not dry clean, tumble dry, bleach or iron.
- Production: Made to order in London by Asia Smaga
- Lead time: Allow up to 20 working days for production after we receive the measurements needed to make your bodysuit. Ask for a RUSH ORDER if you need it quicker.
- Delivery: Shipping options and charges are shown at checkout. Delivery time is additional to production time.
- Returns: Accepted within 30 days of delivery, subject to our Returns Policy.
SIA is handmade to order and can take up to 20 working days to make once we receive your measurements.
Need it sooner? Ask us about a Rush Order. There is no additional charge for prioritising your order. If a Rush Order is subsequently returned for a refund, £20 will be deducted from the refund to account for the additional production prioritisation. Please see our Returns Policy for full terms.
How my SIA construction works for you — 01
I attach the supplied fabric shoulder straps to SIA with gold-plated G-hooks and position the adjusters at the front, where you can easily reach them to change the tension. At the side, the strap anchors into the bodysuit under your arm, helping to keep the cup close to your body rather than letting it bow outward.
The G-hooks give the straps a secure attachment, minimising the risk of accidentally unclipping. The straps themselves are interchangeable, so if your dress needs something different you can buy my clear silicone, spaghetti or longer straps separately. For a cross-over position you’ll need longer straps; for a racerback look, you'll need my converter strap.
How my SIA construction works for you — 02
SIA’s underwired cup structure holds and centres the bust within the balconette cup shape, which suits square, round and high necklines well. The cup is covered with a smooth fabric for a seamless surface with only a fine stitch along the top edge rather than bulky elastic, so there is less for your dress fabric to pick up.
At just 1mm thick, the moulded cups won't add any volume to your bust but will help to smooth out and hide nipples that can often show through slinky silk fabrics.
How my SIA construction works for you — 03
I designed SIA for customers who want more coverage than FRANKIE’s tanga but still need the bodysuit to disappear under a fitted dress. I cut the full briefs with laser-finished edges instead of bulky elastic, so they lie flatter against your skin without rolling or wrinkling.
I keep the rest of the body equally clean, joining it with a single seam at the centre back rather than adding bulky side seams across your hips. My patented construction lets me keep the back ultra low without a bra back band, and I add a hook-and-eye gusset so you don’t need to remove the whole bodysuit for the bathroom.
Choose SIA if...
Product and fit guidance provided by Ender Legard founder, Asia Smaga
Your dress fabric is very smooth, slinky, satin, silk or bias-cut and you're worried about anything showing through.
SIA is one of my most seamless full-brief styles. I recommend it for fabrics where a cup seam or brief line is more likely to show.
You want a completely smooth balconette cup with no pleat, dart or seam across the surface.
I use a moulded cup with nothing across its surface, so there's no extra line for unforgiving fabric to pick up.
You prefer full briefs over a tanga.
SIA gives you full hip and lower-body coverage. FRANKIE has the same seamless cup as SIA, but with a tanga instead. I designed the briefs to cover and smooth, not to shape or compress.
Your dress is very fitted.
SIA's full briefs are cut with laser edges, so the edge sits flatter and is less likely to create a visible line under close-fitting fabric. That's why I recommend SIA for fitted dresses.
You want nipple coverage under smooth or unlined fabric without added push-up padding.
I use a thin 1mm moulded foam cup for shape and opacity, with no extra padding insert.
Your dress has a square, round or high neckline rather than a deep-V or ultra-plunge front.
The balconette shape is the better match here. When the neckline drops below what a balconette can follow, I'd point you to KYA or LIV instead.
You're choosing between SIA and INCA and your fabric is too unforgiving for a cup seam.
SIA's moulded cup is seamless. INCA has a fine vertical seam, so I'd choose SIA when that seam could show through.
You want one bodysuit for more than one dress.
SIA isn't tied to one occasion. I'd recommend it under any backless or low-back dress with a square, round or high neckline, so the same bodysuit can go from a gown to a second dress.
Thank you @ender_legard. You're always our go to brand as they work so perfectly with our dresses and our brides sing the praises of your customer service team. Look forward to continuing to work together.
Consider another style if...
Your dress has a deeper neckline.
If your neckline sits slightly lower than SIA's balconette shape, I would suggest MAE as an alternative. While both styles have moulded cups, MAE’s cup are lower, offer less coverage and sit deeper at the centre front.
You prefer a high-apex bra shape.
If you know that a high-apex bra suits you better and will work with your dress neckline, I would usually point you to either my JONI or INCA styles. JONI is my high-apex minimiser style designed for high necklines, and INCA uses the same cup with full briefs.
You want more of a minimising bra shape.
If you have a fuller bust and specifically prefer a minimising shape that does not add volume, I would look at the JONI. It is the minimiser style I recommend most often for high necklines. JONI does have a fine vertical dart seam on the cup where SIA’s cup is seamless, so check with me to confirm the seam will not show under your dress.
You prefer tanga briefs rather than full briefs.
If SIA's seamless balconette cup suits you but you prefer a tanga-style brief, consider FRANKIE instead. Both styles have the same seamless moulded cup, but SIA provides full-brief coverage while FRANKIE has a higher-cut tanga. If your dress is extremely fitted around your bottom, FRANKIE's higher leg cut may be less visible under the fabric.
Your dress is thick or fully lined enough to hide a cup seam.
The main reason I recommend SIA for very slinky dresses is the seamless moulded cup. If your dress fabric is heavier or properly lined and a lace or seamed bra doesn’t show through, you have more freedom to choose another bodysuit style like JONI or INCA for their different bra shape.
Your dress is V-neck.
INCA and KYA are better suited for V-neck dresses. The shape of their high-apex cup, centers your bust to create a subtle cleavage. Both are also full briefs bodysuits like SIA.
Compare SIA to the closest alternative style
I designed my bodysuits by neckline style and cup shape. Sometimes an alternate style may suit your dress and shape better than your chosen bodysuit. Here are the closest alternatives to SIA.
Square, round (also suits high-neck dresses)
Square, round (also suits high-neck dresses)
Plunge (also suits high-neck dresses)
Moulded foam, balconette — seamless
Moulded foam, balconette — seamless
Soft triangle cup, minimiser — seam from base to nipple
Non-padded
Non-padded
Non-padded
Ultra low, no bra back band *patented
Ultra low, no bra back band *patented
Ultra low, no bra back band *patented
Full brief
Tanga, high leg cut, minimise VPL
Tanga, high leg cut, minimise VPL
Interchangeable — standard, clear silicone or spaghetti; 3 multi-way positions — racer back, cross-over, standard
Interchangeable — standard, clear silicone or spaghetti; 3 multi-way positions — racer back, cross-over, standard
Interchangeable — standard, clear silicone or spaghetti; 3 multi-way positions — racer back, cross-over, standard
Slinky or bias-cut fabric where a seam or pleat would show; square or round neckline dresses. A-line or looser fitted dresses or skirts around your bottom.
Slinky or bias-cut fabric where a seam or pleat would show; square or round neckline dresses; Mermaid shape or very fitted /unforgiving fabric around your bottom.
When a minimiser shape matters more than cup seamlessness; Mermaid or very fitted unforgiving fabric around your bottom.
Frequently asked questions about SIA
Not sure SIA will work with your dress? Send me a photo of your dress or a link to the designer's page and I will help you choose the right size and style before you order.
For general FAQs about shipping, returns, customs etc, see our FAQ menu or email customercare@enderlegard.com
What's the difference between SIA and FRANKIE?
They share the same seamless moulded balconette cup — the difference is entirely in the brief. SIA has a full brief for complete lower-body coverage; FRANKIE has a high leg tanga cut that sits higher on the sides.
Will SIA's full briefs shape or lift my bottom?
No. I shape the bust and tummy through the bodysuit panel — the briefs are there for coverage and a non-visible panty line only, not compression.
Will the SIA work under my square or round neckline dress?
Yes — these are exactly the neckline styles I created SIA for. I set the cup attachment lower on the sides than on my other bodysuits, specifically so it sits hidden under a straight-cut front rather than showing above it.
Will the SIA show any lines or seams under my dress?
SIA is designed to minimise visible lines under smooth or close-fitting dresses. Its moulded cup has no seams, pleats or darts, while the full brief has laser-cut edges rather than bulky elastic. Very thin or tightly fitted fabrics can still reveal garment edges, so the final result depends on your dress and fit.
Is the SIA cup padded?
No. The cup is a seamless balconette-style cup made from thin, 1mm moulded foam, which gives it shape and structure without increasing your bust size. There is no built-in pocket for extra padding, although you can add our self-adhesive inserts to the inside of the cup if you want more volume.
Can SIA support a fuller bust — or should I choose JONI instead?
SIA is available in fuller cup sizes up to FF on a 32 or 34 band, F on a 36 band, and E on a 38 band. When correctly fitted, it will lift and support, not just cover your bust. That said, cup shape and your bust shape matter as much as cup size. If minimisation and containment are your priority, and your dress neckline allows, I may recommend JONI instead. If a completely seamless cup or a square neckline is the priority, SIA is usually the better starting point.
Will my nipples show through a smooth or unlined dress?
No — SIA's moulded foam cup gives full nipple coverage with no seam or dart to create an outline, which is why I treat the SIA as the safest option for brides and occasion wearers in unlined, unforgiving fabric.
Can I change the straps on the SIA?
Yes. It works with standard, clear silicone or spaghetti straps in three positions — over the shoulder, racer-back, or cross-over. For racer-back or cross-over you'll need longer or converter straps, which I sell separately.
How low can the back of my dress be with SIA?
SIA's low U-shaped back is designed to sit below your natural waistline, leaving your back open without a bra back band showing. If the back sits too high, gently pull the bodysuit down at the back and redistribute the fabric through the gusset towards the front to position it correctly.
Should I choose SIA or INCA?
I'd choose SIA if your dress fabric is genuinely unforgiving — smooth, slinky or unlined — since its cup has no seam at all. I'd choose INCA if you'd rather have a cup with no foam lining whatsoever: SIA's cup isn't padded, but it does have a thin, 1mm moulded foam construction for shape and opacity, while INCA's minimiser cup has none at all — at the cost of a fine vertical seam that's a non-issue on most fabrics but a real consideration on very fine fabric.
SIA or MAE. What's the difference?
SIA's cups offer more coverage than MAE's cups. I often refer to it as my full-coverage balconette style. If more cup coverage is your preference, choose SIA
Can I wear SIA under more than one dress style?
Yes. SIA can work across more than one dress style when the necklines and fabrics suit its construction. I've recommended it to customers needing one bodysuit for two outfits — a wedding gown and a separate reception dress, for example — where both dresses worked with SIA's square, round or higher neckline coverage and its seamless finish under slinky or unlined fabric.
Can I return it if the size or fit isn't right?
Yes. SIA is returnable within 30 days of delivery. If the issue is fit rather than a change of mind, send me your measurements or a fitting photo first — I regularly work through sizing and positioning with customers before deciding whether an exchange, a different style, or a return is the right answer. See the full Returns Policy for the complete terms.
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SIA customer reviews on Google
— Sarah Moore, SIA Nude 34C
"Absolutely amazing service. I bought the 'Sia' to wear under my backless wedding dress. Asia was incredibly helpful and responsive; giving me the perfect instructions on how to measure up. I wore my dress for around 15 hours and this item held my girls up perfectly. It also gave my 49 year old body a great silhouette! It is worth every penny and I would definitely recommend!"
— Laura Emmerson, SIA Nude 36D
"Wow!! The most impressive experience with Ender Legard and Asia, super helpful advice pre sale, the item fits like a glove and is the only solution I could find on the market for the type of dress I have. Turned around incredibly quickly for me and the events I have. I have never ever had shapewear like this before I’m in awe - thank you"
