A wireless bra is a bra without a metal underwire, where shape and support come from foam cups, side boning and a firm band size. For cup A to D it's often more comfortable than an underwire bra — no pressure points, no shifting. For cup E+ and up, wider side boning or a 3D-shaped cup becomes more important. Novyre's Luma Forma 2.0 is built up to size 3XL+ and cup F.
What exactly is a wireless bra?
A wireless bra — also called a "bra without underwire" — replaces the classic metal wire under the bust with other support systems. The result: the same shape and support, without pressure points, shifting and the poking feeling many women know from underwire bras.
Three techniques do the work:
- Foam cups: double-layer memory foam holds its shape during movement without sagging. Gives a smooth silhouette — no push-up, but a natural roundness.
- Side boning: flexible plastic bones along the side of the cup provide lateral support. Essential from cup D upward.
- Underbust band: a 4 to 6 cm wide elastic band that carries 80 percent of the weight. Physically identical in principle to a well-fitting underwire bra, without the metal.
Who does a wireless bra work for?
Cup A to C — always a good choice
At these cup sizes, the breast carries so little weight of its own that a wire is structurally unnecessary. A well-constructed wireless bra gives identical shape here with more comfort.
Cup D to F — construction is what matters
This is where good and poor models separate. The Luma Forma 2.0 uses 7 mm foam cups (instead of the standard 4), continuous side boning instead of just 2 loose bones, and a wider 6 cm underbust band. That combination performs demonstrably on par with an underwire bra up to cup F.
Cup G and larger
This is where it gets more specialised. Novyre goes up to cup F — for anything larger, we openly point you toward specialist brands.
The Luma Forma 2.0 in one paragraph
Our second-generation wireless bra, developed after 150+ fit tests: double-layer 7 mm foam cups, continuous side boning made from flexible polyamide, a 6 cm underbust band with power mesh, three rows of hooks at the back, 13 sizes from XS to 3XL+. OEKO-TEX Standard 100 certified microfibre. Novyre holds a 4.6 out of 5 on Google (135+ reviews). 14-day returns — try it first, pay after.
How do you find the right size for a wireless bra?
Many women have been wearing the wrong bra size for years. With a wireless bra, this becomes more noticeable, because the underbust band does 80% of the work.
- Measure your underbust: directly under the bust, firm but not tight. Round to 65, 70, 75, 80, 85, 90.
- Measure your bust size: horizontally around the fullest part of the bust, without compression.
- Cup difference: bust size minus underbust. 12 cm = B, 14 = C, 16 = D, 18 = E, 20 = F.
Example: underbust 78, bust size 94 → 80D. A complete step-by-step guide with a printable measuring tape is coming soon.
The 7 most common mistakes when buying
- Underbust band too loose — the number 1 mistake. Rule: no more than 2 cm should be able to be pulled away at maximum tension.
- Wrong cup size — with a wireless model, you often need to go up half a size compared to an underwire bra.
- Insufficient support for cup D+ — side boning is essential.
- Straps too tight — the straps should carry 10-15% of the weight, no more.
- Ignoring material allergies — test microfibre and polyamide if you have sensitive skin.
- No wear test — always move around and bend for 15 minutes before deciding. Novyre's 14-day try-on — try it first, pay after — makes this risk-free.
- Only one colour — fit can vary slightly between black and light-coloured versions due to different fabric batches.
How do you make a wireless bra last longer?
A good wireless bra lasts about three years (roughly 180 washes). The rules:
- Wash at 30°C, never warmer. Higher temperatures damage the foam cup structure.
- Always use a wash bag — this prevents the cups from bending out of shape.
- Never put it in the dryer. Dry flat, don't hang it.
- Rotate between 3-4 bras — the elastic recovers between wears.
- No fabric softener — it breaks down the elastane structure.
Why Novyre: facts, not marketing
Novyre is a Dutch lingerie brand from Tilburg, founded in 2023. What we concretely do differently: fit tests with 150+ women before every launch, XS to 3XL+ as standard in the collection (not as an exception line), 14-day returns, OEKO-TEX Standard 100 certified fabrics, and a 4.6 out of 5 on Google from 135+ verified reviews.
Frequently asked questions
Is a wireless bra less supportive than an underwire bra?
Not by definition. Modern wireless bras use foam cups with side boning or 3D-shaped fabric. For cup A to D, this is often more comfortable without any loss of shape. For cup E+ and up, side boning becomes more important for the same lifting effect.
How do I know my cup size without a wire?
Measure your underbust and bust size. The difference is your cup: 12 cm = B, 14 = C, 16 = D, 18 = E, 20 = F.
Are wireless bras suitable for larger cup sizes (D+)?
Yes, provided the model is designed for it. The Luma Forma 2.0 comes in 13 sizes up to 3XL+ with double-layer foam cups and continuous side boning.
Will my breasts sag because of a wireless bra?
No — this is a myth. Breast sagging is determined by skin elasticity, genetics, gravity and age, not by bra type.
Can I wear a wireless bra every day?
Yes. These bras are actually designed for daily wear and often cause fewer pressure points. Do rotate between 2-3 bras so the elastic can spring back.
What does a good wireless bra cost?
The price range runs from 15 to 80 euros. At 30-50 euros, you already get professional construction with foam cups and side boning. Fit matters more than price.
Which fabrics are best?
Microfibre (polyamide + elastane) is the standard — breathable, stretchy, durable. OEKO-TEX certified fabrics avoid harmful substances.
Not sure which one suits you best? Read our honest comparison of bras with and without underwire — including a decision check per cup size and body type.
