What is the underboob trend, and how do you wear it?
The underboob trend is any top, dress or swimsuit cut to show a little of the lower curve of the bust, from a cropped top that stops just under the bust to a cut-out beneath the cups. The easiest way to try it is to layer a cropped top over a longline bralette or bandeau. For bolder cuts, support comes from the garment itself, an adhesive bra or body tape.
It looks most polished when the rest of the outfit is simple: high-waisted bottoms, one revealing piece at a time, and a layer such as an open shirt or blazer you can add or remove.
It suits festivals, the beach, resort trips and evenings out far better than the office, and it works on every bust size with the right support underneath.
The underboob look has moved from runways and festival fields into resort wear, swimwear and evening tops. It can look relaxed and summery or sharp and editorial, depending on how much you show and what you pair it with.
Here is what the trend is, three ways to wear it from subtle to bold, what to wear underneath, how to style it for your bust size, and how to keep it comfortable.
- Start subtle: a cropped top layered over a longline bralette.
- Go bolder with cut-out tops, dresses or underboob bikinis.
- Support comes from built-in structure, an adhesive bra or body tape.
- Balance it with high-waisted bottoms and one revealing piece.
- Save it for festivals, the beach and evenings, not the office.
What the Underboob Trend Is
A cut that shows the lower curve of the bust instead of the neckline.
Most revealing styles focus on the neckline or the back. The underboob look moves the focus lower: a hem that stops just below the bust, a cut-out beneath the cups, or a bikini top cut high at the bottom edge. How much it shows ranges from a glimpse of a bralette band to a deliberate, sculpted cut.
It grew out of cropped tops and festival dressing, and it now shows up in swimwear, resort sets, evening tops with cut-outs and layered looks built around bralettes. The common thread is that the lower bust line becomes part of the design.
Underboob sweat is a comfort problem, not a style. If that is what you are dealing with, our guide to bra chafing and underboob sweat covers what helps.
Three Ways to Wear It
Choose the level that suits the occasion and your comfort.
What to Wear Underneath
The right foundation is what makes the look comfortable and secure.
Adhesives and tape can irritate sensitive skin. Apply them to clean, dry skin with no lotion, follow the product instructions, and stop if you notice redness or itching.
Shop bralettes, lace bralettes, bandeau tops, sticky bras and nipple covers for the layer underneath.
Styling It for Your Bust Size
Every bust size can wear the trend. The support underneath changes.
| Bust | Best approach | Support |
|---|---|---|
| Smaller busts | Any level, including bold cuts | Adhesive bra, covers or none |
| Medium busts | Layered or cut-out styles | Bralette, adhesive bra or tape |
| Fuller busts | Layered looks and structured tops | Longline bralette or built-in cups |
| Plus size | Longline layers, high-waisted bottoms | Supportive longline bralette |
Smaller busts have the most freedom, because cropped and cut-out styles sit easily with little or no support. Fuller busts usually look and feel best in the layered version, where a supportive longline bralette does the work and the cropped top adds the shape. Our guide to bralettes for large busts covers styles that actually support. For bold cuts, look for tops and swimwear with built-in structure rather than relying on tape alone.
If the bralette or bra underneath is part of the look, fit matters as much as with any everyday bra. Brasize.ai can help you check your size before you buy.
Outfit Formulas That Work
Balance is what keeps the look polished rather than costume.
A few rules keep it looking intentional. Show one area at a time: if the top is cropped and cut low under the bust, keep the neckline higher and the bottoms longer. Pair cropped tops with high-waisted bottoms so the gap is deliberate, not accidental. And keep a layer, such as an open shirt, blazer or cardigan, that lets you adjust how much shows.
The Hauty Akane Lace Crop Top is designed to pair with high-waisted bottoms, which makes it an easy starting point for the layered look. Browse all crop tops for more.
The Underboob Look in Swimwear
Swimwear is one of the easiest places to try the look.
Underboob bikini tops are cut so the lower edge sits higher than a standard triangle or balconette. Many have structure, such as underwire or molded cups, which gives support while the cut does the styling. For a softer version, a bandeau top worn slightly higher, or a bikini top with a cut-out band, gives a similar effect with more coverage.
For a fuller bust, look for supportive swim tops in proper bra sizes; browse underwire bikini tops and all bikini tops. The Hanky Panky Balconette Bikini Swimsuit Top has an underwire, lined cups and wide adjustable straps, and mixes and matches with the bottoms in its collection. Our guide to bandeau bikinis covers how to choose one that stays up.
Skin that is usually covered is easy to miss with sunscreen and quick to burn. Apply it before you dress, including along the lower edge of the top.
Where to Wear It
Context decides whether it reads as stylish or out of place.
| Occasion | Good fit? | Best version |
|---|---|---|
| Beach and pool | Yes | Underboob bikini or bandeau |
| Festivals | Yes | Bold cut with an open shirt |
| Resort and vacation | Yes | Layered or cut-out styles |
| Evenings out | Yes | Cut-out top or bodysuit |
| Casual daytime | Sometimes | Subtle layered version |
| Office or formal | No | Choose a different look |
Keeping It Comfortable
A few practical points make the look easier to wear for a whole day or night.
If you are trying the trend for the first time, start with the layered version for a day and see how it feels. Once you know what you like, it is easy to go bolder. For pairing the right bra with other tops in your wardrobe, see our guide to bras for every neckline. If you prefer adhesive support, the Fashion Forms Plus Size Adhesive U Plunge Bra has a silicone adhesive and sits under cut-outs without a band or straps.
What This Means for You
The underboob trend shows the lower curve of the bust through cropped hems, cut-outs and swim cuts. Start with a cropped top over a longline bralette, move to cut-out styles with an adhesive bra, and save true underboob cuts for the beach, festivals and nights out.
Choose your support by bust size, balance the look with high-waisted bottoms and one revealing piece, keep a layer handy, and look after your skin if you use adhesives or tape.
Bralettes, Necklines and Adhesive Bras
The foundations behind every revealing look.
BralettesNecklinesAdhesive BrasFrequently Asked Questions
What is the underboob trend?
What do you wear under an underboob top?
Can you wear the underboob trend with a large bust?
Is body tape safe for underboob tops?
Where can you wear an underboob top?
How do you keep an underboob top from riding up?
This guide is for general style information. If you use adhesives or body tape, follow the product instructions and stop using them if your skin becomes irritated.
