The Casual Blue Harbour M&S Casual Navy Shirt in size XL is a classic wardrobe staple perfect for summer holidays. The solid shade of blue, collared neckline, button closure, and short sleeves make it ideal for casual occasions. Made with machine washable fabric, this regular fit shirt from Blue Harbour is a timeless addition to any man's clothing collection. Ideal for creating a relaxed and stylish look during the warmer months, this button-up shirt is a versatile piece that can be dressed up or down effortlessly.