Keep Calm and Carry On Apron with Union Jack Union Jack apron for women or men with Keep Calm and Carry On slogan. 100% cotton canvas with treated adjustable strap that wraps around neck and cinches at sides. Keep Calm and Carry On is a universal message from a British WWII poster. It's a good message for the kitchen. Apron comes with card telling history of Keep Calm and Carry On slogan.