The Apex design features a custom fitted Neoprene cover that protects your Apex line of thermal optics. Specifically designed to give you full functionality of your thermal unit. Maintaining easy to use front focus and menu turret. The OPTI-SOC will not interview with your thermal control function. Providing all functionality while protecting your unit. OPTI-SOC patented design features a handwarmer pocket to help with increased battery life for those cold winter nights! Apex series are designed to fit any of the current manufactured mounts.