Not just another shirt - meet The Duo A timeless wardrobe classic with a functional twist - The Duo Shirt was born out of love for everlasting silhouettes that make women feel beautiful, while being functional during and post pregnancy. Discover more. Clean cut, with just the right boyfriend fit to make it look comfortably casual, even with a baby bump. The Duo shirt features a double front layer, so it can be worn open or tied under the bust, poetically emphasizing growing curves. With easy access under the arms, nursing is almost invisible, but accessible when you need it the most. As part of our new, seasonless collection, crafted to present the right products when moms need them the most, the Duo Shirt is a new addition to our beloved hero products, thoughtfully created and designed to last.