Another Relwen exclusive fabric, this one a first to our knowledge, adding stretch fiber to a brushed flannel shirting. The result is a permanently crinkled (seersucker) look that refuses to be ironed. We don’t iron anything, so no harm. Another effect of the crinkled look serves to help hold the shape while also conceding movement not typically (ever) found in a flannel shirt. All natural mother-of-pearl shell buttons with classic buttondown collar.