A blazer dress is tailoring doing the work of a dress: sharp shoulders, a nipped waist, and lapels that plunge to the sternum or lower with nothing underneath by design. Two problems come with it. The lapel V is too deep and too central for a bra — even most plunge bras — and the lapels themselves are just two flaps of fabric that shift and gape every time you lean, reach, or hug someone hello.
The Straight Answer
Wear Boob Tape with nipple covers underneath. Tape gives you lift and shaping inside the deep V where no bra can go, and a short strip doubles as an anchor holding each lapel flat against your skin so the neckline stays exactly where you set it. If your blazer dress buttons higher and you only need coverage, The Original Sticky Boobs alone are enough. A thong bodysuit is the third option — more security, more lines — and we'll weigh it honestly below.
Tape: Lift Plus Lapel Control
Boob Tape ($18) is the blazer dress's best friend because it solves the geometry twice. First, lift: cut strips, raise each breast, and tape from below the breast up toward the shoulder, keeping every strip inside the line of the lapels. Second, control: once dressed, press a short strip between the inner edge of each lapel and your skin at bust level. The lapels stay put through a full dinner of leaning across the table. Wear nipple covers under any strip that crosses the nipple, and take the tape off slowly with oil, never a dry rip.
Just Coverage: Nipple Covers Alone
Some blazer dresses close with a high double-breasted button stance where the V ends above the bust. There, skip the tape and wear The Original Sticky Boobs ($25) — ultra-thin adhesive silicone covers that smooth you out under the single layer of suiting fabric (most blazer dresses are unlined at the bust or lined with slippery acetate that shows contours). Three shades, three sizes, and reusable around 50 wears.
The Bodysuit Question
A low-plunge thong bodysuit under a blazer dress adds a security layer — if a lapel swings open, there's fabric, not skin. The tradeoffs are real: the bodysuit's plunge edge can peek inside the lapel line, the snaps sit exactly where a fitted blazer dress is tightest, and you've added a layer under structured wool on a warm night. Our honest take: bare-plus-tape looks cleaner and photographs better; the bodysuit wins for long work events where you'll be reaching and presenting rather than sitting.
Setting Up the Neckline
- Put the dress on first without any tape and stand in front of a mirror. Note exactly where the lapels naturally cross — that's your coverage line.
- Take the dress off, place nipple covers, then apply your lift strips, keeping all tape at least a finger-width inside that coverage line.
- Dress again, set the lapels where you want them, and anchor each one to your skin with a short strip at bust level.
- Now stress-test: sit, cross your legs, lean forward over a table, reach across your body. Adjust the anchor strips until nothing shifts.
- If you'll be belting the dress, buckle it before the final lapel check — a cinched waist changes how the lapels sit.
Where This Won't Work
If your blazer dress is a size too big at the shoulders, no amount of tape keeps the lapels from swinging — that's a tailoring problem, and a $20 shoulder-and-side alteration will do more than any undergarment. Also skip the sticky bra here: its front clasp sits low-center, exactly where a deep lapel V opens, so it tends to show in precisely the dresses that need help most.
FAQ
Can you wear a bra under a blazer dress?
Usually not with a deep lapel V, because the center gore and cups sit inside the open neckline. If your blazer dress buttons above the bust, a regular plunge bra can work fine.
How do you keep blazer dress lapels from gaping open?
Anchor each lapel to your skin with a short strip of body-safe tape at bust level after you've set the neckline where you want it. Fabric-to-skin holds through leaning and reaching far better than fabric-to-fabric tape.
Should I wear a bodysuit under a blazer dress?
It's a security-versus-cleanliness tradeoff. A plunge bodysuit protects against gaping but adds snap bulk, a visible plunge edge, and warmth; tape plus nipple covers gives a cleaner line for dinners and photos.
Why not wear a sticky bra under a blazer dress?
The front clasp of a sticky bra sits low and center, right where a deep lapel V opens, so it can show. Boob tape gives lift inside the V with nothing placed at the centerline.
Grab Boob Tape and a set of nipple covers, and your blazer dress neckline will hold its line all night.
