The Brummer Popover Button Down Shirt by Johnnie-ODetails 95% Cotton 5% Spandex Long sleeve popover shirt Button down collar Split tail Button cuffs Chest pocket with embroidered logo Imported Benefits Laughably soft and stretchy. This shirt flat out feels fantastic. Wearable in all seasons due to the cotton spandex blend, and it goes with just about every pair of pants you own. The split tail helps it stay tucked if that's your jam, but it also looks a great deal better untucked.