I know what I'm ordering tonight. I've been wearing my Coastal Tanks like crazy since the weather has turned warm, and I've worked out in them now and really love them for a sweaty workout. I hope this new version the Waterbound Singlet is pretty much the same as the Coastal Tank, I think this looks a bit longer though. Sounds like the Waterbound Bra is also chlorine resistant material.
I wear my Coastal Tanks casually as street wear and I hate wearing a sports bra casually so I picked up this Victoria Secret Front - Close Racerback Demi Bra and I absolutely love it. The back is fully covered by a Cool Racerback, and mostly covered by the Coastal Tank with just a bit of lace peeking through here and there. The bra is also the most comfortable racerback bra I've ever tried on. I definitely recommend it if you've been wondering what bra you can wear with the coastal tank.