Isaia shirts 60% Off. Authentic Isaia Napoli silk ties and men dress shirts, hand made in Italy. Isaia is known for it's sartorial quality men collection including sport coats, shirts and sevenfold ties. Isaia shirts come in single cuffs, spread collar, corduroy and button-down shirts. The Isaia shirt has a hand stitched mouche, buttons, collar, armhole.