J. Crew Classic Flex Washed Plaid Button Up Long Sleeve Shirt. Size XL The J. Crew Classic Flex Washed Plaid Button Up Long Sleeve Shirt in size XL is a versatile and timeless piece perfect for casual occasions. Made from comfortable cotton fabric with a woven texture, this shirt features a classic collared neckline and button-down closure. The multicolor plaid pattern adds a touch of style, while the shirt is machine washable for easy care. Ideal for all seasons, this button-up shirt can be paired with a variety of bottoms for a classic and polished look.