Abstract: An improved closure member for a package is provided comprising first and second profile strips sealed to the package at the package opening, a male member formed on the first profile strip, a post member also formed on the first profile strip on the inboard side of the male member, a female member formed on the second profile strip and capable of mating with the male member under pressure, thereby forming a releasable closure mechanism for the package. The profile strip is secured to the package in a limited area such that all disengagement forces which act initially on the package are directed to the strip through a single path. The post member is positioned close enough to the male member to provide added resistance to the disengagement through a wedging or pivot-type interaction with a portion of the female member.