The Irish grandfather shirt or "Sunday Shirt" is a shirt that has come back to the forefront of men's fashion in recent years. When it comes to Irish mens shirts, the grandfather shirt is as versatile and vintage as it gets. It's a unique vintage collarless shirt that works for all styles and ages. Grandfather shirts can be matched with anything from boot cut jeans and leather boots for a classic look. To complete the look, match with our Irish waistcoats.