What bra to use for a deep V-neck?

If you're wearing a shirt or dress with a deep V-neck neckline, the best bra to wear is a deep plunge bra. 

What makes a plunge work is a low center front, not a wire. Honeylove's CrossOver V-Neck Bra sits half an inch to three-quarters of an inch lower than the original CrossOver and uses a bonded cradle in place of underwire, with side-bust boning keeping the chest pointing forward for cleavage without padding.