Strapless and backless are often mentioned together, but they are different problems. A strapless dress takes away the shoulders. A backless dress takes away the back. Shapewear that solves one can be exactly wrong for the other, so it helps to treat them separately, and to be honest about which garments simply will not work.
Strapless: what holds the dress up
A strapless dress or top stays on the upper body without shoulder straps or other visible means of support. Wikipedia’s article on the style explains how: it is usually supported by an internal corset or bra, or both, and the tightness of the bodice keeps it from slipping.
The design has loosened over time. Strapless dresses of the 1930s to the 1950s needed built-in corsetry, and some cautious wearers added shoulder straps of their own. By the 1980s, strapless dresses were being made in stretchy, elastic fabrics that did not need boning or an internal structure.
That history matters when you get dressed. A structured, boned bodice does much of the work itself. A stretchy, unstructured one relies more on what you wear underneath.
Choosing for a strapless dress
You need a piece with no straps, or with straps you can take off. In our range, that is the Strapless Hook-Front Bodysuit. It has smooth underwired molded cups and a straight neckline, and it fastens down the full center front with small hooks and eyes, so you can put it on and take it off without help. It has a brief-cut bottom with high-cut leg openings rather than legs, so it suits a dress of almost any length.
Two things to check before the day:
- The back of the dress. This bodysuit has a full-coverage back. Under a strapless dress with a covered back, that is not a problem. Under a strapless dress that also dips low at the back, it will show.
- The crotch. The bodysuit fastens there with two small hook tabs; it is not an open-gusset piece. Plan for that if you will be dressed for many hours.
Fit matters more here than anywhere. A strapless top relies on fitting closely at the bust, so choose the size with care using the fit guide, and ask us if you are between sizes.
Backless: a different set of choices
A backless dress is designed to show the wearer’s back, partly or entirely. The style appeared in the 1920s, and in the 1930s it became linked with sun tanning, as a way to show a tan without lines.
For the bust, Wikipedia notes that most women who choose this style prefer to go without a bra, and that for those who want support there are designs made for it: convertible styles, adhesive bras, underwire and strapless bras.
None of our pieces with a bust section is backless. Our two bodysuits with straps have high, covered backs; the strapless bodysuit has a full-coverage back; the Long-Line Underwire Bra fastens with a row of hooks at the center back, and the Hook-Front Wide-Strap Bra has a smooth, high back panel. Under a truly backless dress, all of them will show. We would rather tell you that here than have you discover it on the day.
What does work under a backless dress
Split the job in two. Handle the bust with one of the backless options above, and use a bottom-only piece for a smooth line from the waist down.
- The Pull-On Open-Gusset Short has a high, smooth waistband and legs to just above the knee, with no hooks or zipper. It suits a long backless dress whose back stops above your waistline. If the back drops lower than the top of the short, it will show.
- The Bow-Waist Smoothing Brief sits at the natural waist and has no legs. It suits a dress that dips a little lower, or one with a shorter hem.
In both cases the test is the same: put the dress on over the piece, turn your back to a mirror, and look at where the back of the dress ends compared with the top of the waistband. Then sit down and look again, because fabric moves.
Lines at the hip
A low-backed or strapless dress is often also close-fitting at the hip, which brings back the usual problem of edges showing through. A visible panty line is the outline of underwear showing through outer clothing, and clingy or thin fabrics show it most. Pieces with legs that end above the knee move the edge away from the hip. A brief moves it to the leg opening, so check it in the mirror under a thin fabric.
The short version
- Strapless with a covered back: a strapless bodysuit.
- Strapless with a low back: a strapless or adhesive bra for the bust, and a bottom-only piece below the line of the dress.
- Backless: never a piece with a back panel. Use a bottom-only piece that sits below where the dress opens.
- Always: try the whole outfit on, standing and sitting, before the day.
Sources
- Wikipedia. Strapless dress. Accessed 2026-10-02.
- Wikipedia. Backless dress. Accessed 2026-10-02.
- Wikipedia. Panty line. Accessed 2026-10-02.