So basically, the reason I love the cropped bras as well as bandeaus is because it is a great way to easily layer and give more life to your outfits. I like to have three colors going on, and black/white/red = one of my favorite color combos, which is why I happened to take this picture on my phone. The black and white bra cropped top is what made this outfit so cute! Before caring to wear the crop tops, I would have just worn the red cami underneath the white tank, which would have been a little on the boring side. The layering bandeaus/cropped bras add another element to your wardrobe.
If you have days where you want to keep it casual yet still feel like you have a fun outfit going on, I highly recommend getting a few pairs of any layering cropped tops/bras. Forever 21 has several cute ones, and of course, they were cheap!