A flexible closure capable of closing a flexible opening. The closure is comprised of two or more strip-like elements that are oriented in a parallel series and have ends that are attached together. The strip-like elements are alternately deformed in groups of one or more to one side and then the other side of a flexible opening. The sets of groups on the two opposing sides of the opening are brought together and held together with a force, usually to create a seal. The closure may be closed in a variety of positions, including curved and straight. The flexible opening being acted upon may be attached permanently inside or outside the closure, attached removably inside or outside the closure, the closure may be placed around the flexible opening, or the closure may be incorporated into the flexible opening. The closure may be used to close such entities as flexible containers.