Everlane short-sleeved box shirt in black The Poplin Short-Sleeve Box Shirt features a notched collar, a clean button front, relaxed short sleeves, utility-inspired patch pockets, and a boxy shape. Wear it tucked into any of our denim for an instantly cool look. Cotton poplin is densely woven, making it both durable and breathable, also giving it a crisp, cool feel. Only worn a few times!