Men's Short Sleeve Button Up Shirts Slim Fit Nimble Made button up shirt Men's Button Up Shirts Nordstrom Men's Button Up Shirts Nordstrom. A timeless classic for little ones. This Petit Bateau button up shirt is crafted from soft, breathable cotton for all day comfort and effortless style. With its delicate details and perfect fit, its designed for both special occasions and everyday charm. Easy to dress up or down, this wardrobe essential is as practical as it is adorablemade for cuddles, play, and picture perfect moments.