These three bras solve three different problems. One is a cut that stays hidden under wide necklines, one is a strap configuration for shoulder-less dresses, and one is not really about function at all.
Demi bras and half-cups
A demi bra is a seamed or boned bra with half-cups, a horizontal bust line and wide-set straps. It covers only the lower half of the breasts and the nipples, leaving the upper part exposed.
Why the wide straps matter
This is the practical reason to own one. The shoulder straps run out toward the outside of the cup rather than sitting close to the neck, which keeps the bra invisible under a wide or deep-cut neckline where a standard strap would show.
If you regularly wear wide necklines and keep finding straps on display, this is the cut that fixes it.
Shape and lift
Demi bras provide some support and a little coverage. Many are designed to provide lift in the same way a push-up does, and the top edge of the cup is usually angled to produce a greater décolletage.
The angled cut makes them a good option for smaller busts, where the lift and the exposed upper breast create a fuller line. Larger busts generally need more containment than a half-cup gives.



Halter-neck bras
A halter-neck bra features clasps on the straps that fasten behind the neck rather than running over the shoulders to the back.
The construction otherwise varies freely. Halter bras are made with padding or with underwires, and they give either full or half coverage depending on the style you choose.
What they are for
They exist for shoulder-less and off-shoulder dresses, where the bare shoulder means a conventional strap has nowhere to sit. Routing the straps up to the neck moves them out of the way entirely.
One point worth knowing: because the straps meet at the neck, more of the weight travels through them than in a standard bra. For a long evening, a halter with a firm band is considerably more comfortable than one relying on the neck strap alone.



Novelty bras
Novelty bras are made for a sensuous look and are more show than function. They carry highly exotic features, designs and detailing, and they are made from rich, exquisite materials.
It is worth being clear about what these are. They are occasion and display pieces, not garments chosen for support or for wearing under clothing all day. Judged as decoration they succeed; judged as functional bras they are not trying to compete.

Frequently asked questions
What is the difference between a demi and a balconette?
The names overlap heavily and are often used interchangeably. Both are half-cup cuts with wide-set straps and a horizontal bust line.
Do demi bras suit larger busts?
Generally not. A half-cup provides limited containment, and larger busts usually need fuller coverage to be comfortable.
Why do halter bras hurt my neck?
Because more weight passes through the neck strap than through a shoulder strap. A firmer band takes the load off, which is the fix.
Are novelty bras practical?
No, and they are not meant to be. They are decorative pieces made from rich materials for occasions rather than everyday support.
For the whole range see bra categories, and for choosing by outfit see conditions determining your bra type.