I love my tank tops and even when the weather starts getting chilly you don't have to pack them away! One of the best ways to transition them for cold weather is to layer them over another shirt. Depending on the tank, you might have a hard time finding the right shirt to layer underneath. But it is definitely an option to remember! :)
You can also layer them under cardigans, jackets, or button down shirts! :) Try belting your tank if you are wanting more definition around your waist.