A bandeau strapless bustier without internal structure relies entirely on fabric quality and precise fit to stay in place. This works if and only if the elastication is placed correctly and the fabric has enough grip to hold without digging. A bandeau bustier is simpler to wear underneath things because there is no underwire to create lines or bulk. It is also lighter to pack if you are travelling. The construction needs to be engineered so it does not slip down or bunch up because there is no hidden support to catch mistakes. These are the bandeau strapless bustiers that work for people who have either found their exact size or who prefer the simplicity of a strapless piece that does not involve internal structure.