Burnout Racerback Tank - Exercise Shirt - Workout Clothes for the Gym - Pregnancy shirt - baby bump - gym tank - exercise tank by MyLittleMonkeysAZ on Etsy https://www.etsy.com/listing/233448625/burnout-racerback-tank-exercise-shirt
One of the few places I've found maternity workout tops in colors other than black: fitmaternity.com. Edited 8/2/15: Two years and another pregnancy later, I still wear these tops (pictured) to work out. They are comfy to wear and perfect for hiding a post-pregnancy belly. I so highly recommend them.