Ok, so I may be a bit biased given that I pretty much live in polo shirts. It seems like between my husband and myself, we are constantly buying more. They are so comfortable, easy to layer, and look a lot more put-together than just throwing on a t shirt.
Anchored Style has some adorable polos for both men and women. I own one of their regular long-sleeve shirts and it is seriously one of the most comfortable things in my wardrobe. I would bet that the polos are even better!