The MAPfrac® Open Hole Packer is a hydraulically activated open hole packer for use in downhole horizontal or vertical well applications. When used with the MAPfrac® Multi-Zone Completion System the packer provides reliable, annular isolation between staged stimulation operations with the use of a fully retained packing element that is locked in place when set. This compact and modular design also allows for better handling and make-up on the rig floor as well a reduced risk of premature setting while running in the hole.