These tanks work exactly as the description states.  There is no need to buy the expensive nursing shirts just wear one of these under what you already own.  I purchased both a black and white shirt and love them.  They run true to size (although should be a somewhat snug fit since it is an undergarment ).  I am usually a large or extra large in a shirt and purchased a large.  I also washed in cold water and dried them without a problem.  The tank is long and covers your hips so the tank does not ride up.  This provides you with the layered look, which is very fashionable at this time.  I gave it 4 stars instead of 5 because the clips at the top don't always stay hooked into certain nursing bras.  Honestly most of the time I leave the tank unhooked and it still stays up beautifully.  If you are modest and do not want you belly hanging out when nursing these tanks are a must have.