Front of garment is sleeveless and fabric wraps from underarm up and around back of neck, usually with a V front. This can refer to either a dress or a separate shirt, called a halter top. There are many styles of halter necklines.
Halter yourself in this Ralph Lauren Black Label Cashmere Turtleneck Halter ($355).
I'm always on the lookout for feminine yet supportive tops for my workouts. I don't mind spending a good chunk of change for a yoga top if it will continue to hold its shape and style after many washings. You know you are going to be washing your workout tops frequently, right?
That's why I love prAna tops. For less than $50, they are all made from amazing fabric that wicks away moisture and never pills or stretches out. Plus they have some adorable styles. Check them out: