Mens Casual LS Shirt Fern by Assembly Label. Our Casual Linen Shirt is a laidback long sleeve men’s style. Designed for a relaxed fit, this breathable linen shirt is made for comfort and ease. Featuring a collar, box pleat and pearlescent buttons, the Casual Long Sleeve Shirt can be styled with denim or shorts, or elevated with a tailored pant for weekend occasions. 100% LinenRelaxed fit, take your usual size for a similar look.