It’s obviously based on modern anti-ballistic armor with perhaps a bit more boob-curve than is common but still makes the priorities of the gear clear:
- Protects vital areas such as the chest and neck
- Can be adjusted to fit the individual wearer
- Facilitates carrying other gear such as pouches, backpack, etc
It’s all stuff that comes from considering what the garment is and what it’s for – rather than what lingerie is popular right now.