Plunge Backless Bras
Made from lightweight, breathable fabric, so you get support without silicone. Knock Out and Black Onyx have no clip in the centre, so they work with the deepest necklines.
Free UK delivery over £40 · Next-day available · 30+ wears
Make it a set
Your bra with colour-matched knickers or a travel case. Every set qualifies for free UK delivery.
Plunge backless bras, explained
A deep plunge is a tricky neckline to dress. Our plunge styles are made from lightweight, breathable fabric, so you get the support without needing silicone.
Knock Out and Black Onyx are our true plunge bras, with no clip in the centre. Want extra hold? The O.M.G. Boob Cover comes with two clear straps, one to wear and one spare.
Backless bra FAQs
Can I wear a stick-on bra with a deep plunge neckline?
Yes. Knock Out and Black Onyx are made from breathable fabric with no clip in the centre, so they sit well under a deep plunge. Not sure which InvisiBra size to order? Find yours in our size guide.
Do stick-on bras actually stay on?
Yes. Put it on clean, dry skin and InvisiBra stays put all day and all night, through a dance floor or a hot summer wedding. Skip moisturiser, oil and body spray where the cups sit.
Do stick-on bras work for bigger boobs?
They can, if your bust is firm and you pick a lifting style. As a guide, your band should be no bigger than 36 for a DD cup, 34 for an E cup, 32 for an F cup, 30 for an FF or G cup and 28 for a GG cup. If your bust has lost a lot of firmness, InvisiBra won't give you much lift.
What size should I get?
InvisiBra sizes aren't the same as your usual bra size. Find yours in our size guide. It takes about 30 seconds. Between sizes? Go down one.
Can I get a backless bra with straps?
Yes. The OMG Boob Cover comes with two clear straps, one to wear and one spare, for extra hold. We don't sell the straps on their own.
Is it sweat-proof?
Yes. The adhesive handles sweat, heat and movement, so it's fine for holidays, festivals and nights out. We don't recommend swimming in it, as water breaks down the adhesive.
How many times can I wear it?
30+ wears if you clean it after every use. Wash the cups in lukewarm water with a little mild soap, clean the sticky side gently with the palm of your hand (never your nails or a brush), then let it air dry, sticky side up. That's what keeps it sticky.
How fast is UK delivery?
We send UK orders by Royal Mail Tracked: Economy in 3–5 working days, Express in 2–3 working days, or guaranteed next day if you order before noon, Monday to Friday. Free UK delivery on orders of £40 or more.