Strike Industries JellyFish Cover Black Polyurethane for Trijicon SRO The Strike JellyFish Cover for Trijicon SRO provides an all-weather protection. Maintain the clean, crisp red dot and unobstructed large field of view of the SRO (Specialized Reflex Optic) design. Help protect your gear with this snug rigid fit flexible Thermoplastic Polyurethane (TPU) construction material. The JellyFish cover has an open design access to the illumination controls. Quick and easy installation that can be rapidly removed for zeroing or when the battery needs replacement. Field tested for effectiveness, the Strike JellyFish Cover for Trijicon SRO ensures the legendary Trijicon durability on and off the range.