Envelop Protective Covers are the next generation of operational covers, replacing vinyl tarps and corrosion inhibiting chemicals. Developed to protect military weapons and assets from water, ultraviolet rays, humidity, sand, thermal temperature spikes and other environmental hazards, covers are now available for consumer and industrial applications such as firearms, oil and gas machinery, airplanes, ships, and more. Envelop covers are manufactured and sold by Shield Technologies Corporation, a ten-year-old, entrepreneurial organization headquartered in Eagan, Minn.