The Aker Leather 101 Comfort-Flex shoulder holster system is the latest version of our first and most popular shoulder holster, developed almost 30 years ago! Each 101 shoulder rig is designed and manufactured in our California factory using materials primarily sourced from the USA. We use a premium full grain leather from North American cowhide, which as a tooling leather is perfect for shoulder holsters since it retains the deep mold of the weapon and magazines, insuring years of use without losing shape as it becomes more comfortable over time.