Assembly Label, Everyday Poplin Shirt Sumac Stripe. The Everyday Stripe Shirt is an updated version of our Everyday Oversized Poplin Shirt with a new, less oversized fit. This button-up shirt is designed for a modern, relaxed fit and is made from crisp 100% cotton poplin. It features a collar and long sleeves with buttoned cuffs and is available in seasonal stripes. Dress yours up or down, depending on the occasion.