A convertible bra will most likely be the best option. They have straps that adjust to different options, some will have more options than others but they should all be able to do a halter neck. If the dress or top goes low in the front as well you will need to get a bra that plunges (see the image under ‘Most common strap options’ on this page, the one that doesn’t do strapless goes much lower).
A strapless bra will work for most halter necks as well. A lot of strapless bras don’t go very low in the front, so make sure you check this if your dress or top is low cut.
If the clothing is likely to shift and expose your bra or bra straps you can use fashion tape to keep it in place.
Some halter neck clothes are designed so you don’t have to wear a bra with them. This sort will be fairly tightly fitted under the bust, the parts that cover your breasts will be shaped to fit over and hold them in place like a bra would. They won’t be as supportive as a bra is but might be enough to avoid needing one.
Convertible (also called multiway) bras are a must to own. The straps come off and have hooks so you can reattach them in different ways to wear with clothes where the straps of a standard bra would show. What strap configurations it can do will depend on which one you get, so check before you buy. The straps will have hooks at each end and there will be lots of…Read more
Strapless bras often come as convertible bras with detachable straps or you can also get bandeau bras. For most cases I would recommend a classic style strapless bra like the one pictured, bandeau bras don’t have underwires to shape them so are tighter across the top of the bust and can cause bulging unless you have a perfect fit or small breasts. Tips for buying a strapless bra Getting the…Read more