A magnetic closure system includes first and second opposing bodies with permanent magnets disposed on or in sloping surfaces of the bodies to keep the bodies in contact until being pulled apart. The bodies may be rigid, semi-rigid or flexible strips or elongated structures comprised of separate blocks, each block having two divergent sloping surfaces. Whether in strip or block form, each body may be adapted for attachment to a flexible material or fabric, such that the opposing bodies form a magnetic zipper. The magnetic closure system many be used in conjunction with many products, including clothing, curtains, bags, backpacks, purses, mats, tiles, or any other situation wherein materials or fabrics are joined.