The present disclosure provides microporous hollow fiber webs, including connected hollow fibers. At least some of the hollow fibers have an open celled porous structure including microfibrils that connect lamellae microstructures. Methods of making microporous hollow fiber webs are also provided. Such methods include obtaining a hollow fiber web having connected hollow fibers, and stretching the hollow fiber web in a machine direction to fracture at least a portion of the hollow fibers to generate an open celled porous structure.