Technology

Invented by the Military for the Military

Envelop is a custom fit cover that can be used on nearly any asset. The material is waterproof so that liquid water cannot permeate the cover from outside, however, water vapor can pass thru the cover. The breathable nature of the cover prevents the "greenhouse" effect while reducing condensation and keeping the metal surface dry. Most Envelop covers also mitigate corrosion thru the use of a Vapor Corrosion Inhibiting (VCI) layer which emits ions that bond with water molecules preventing them from bonding with metal. This stops electron transfers thereby preventing corrosion. The ions do not bond with metal or optics nor do they affect electronics in any way.

The patented technology that makes Envelop so effective is the combination of breathability and VCI. Moisture vapor transmission, the measure of breathability, alone will not lower humidity below corrosive levels inside the cover if the ambient humidity is at a corrosive level. Without VCI, a cover has no ability to fight corrosion without lowering relative humidity under the cover to a level that is less than ambient. The way to most effectively protect an asset is to provide a cover with a vapor transmission rate that is high enough as to not cause a greenhouse effect while also incorporating a VCI for those cases where humidity is at a corrosive level. Envelop Protective Covers are the only product available that combines high moisture vapor transmission with a VCI.

The Envelop solution is easy to use, similar to traditional covers used by the military, however, Envelop's cover technology has been shown to reduce corrosion by up to 95%. In addition to corrosion protection, Envelop will protect against moisture, sand, dirt, UV, airborne pollutants, heat, cold, FOD impact, and wind.

Key Features

Design Process

The design process begins with an engineer capturing inputs for the design, then converting them to CAD files. This process reduces the time required from concept to finished product by increasing the accuracy of the initial design and including the necessary functionality in early-stage prototypes. Prototypes are fitted with Soldiers and Marines to ensure the designs are favorable for the operating environment in which they will be deployed. Weight, accessibility, operational firing capability, packability, ease of installation/removal, and storability are just a few of the dimensions which are optimized when covers are designed. Lastly, all feedback rendered from the end-users is incorporated to designs to help war-fighters maximize the benefit they receive from their Envelop Protective Cover.

"These covers were very effective, extremely easy to use, and greatly contributed to the howitzers being used for training in a minimum amount of time. Busting rust on the gun generally takes one hour. After removing the covers,it took less than 10 minutes. This allows us to spend more time training and less time pulling maintenance."

Senior Instructor (SFC), U.S. Army

How It Works

4-Layer System

1. Hydrophobic wicking layer pulls moisture from surface of equipment.
2. Non-porous membrane eliminates intrusion of corrosion causing micro Sulfur Dioxide and Chloride molecules, while preventing clogging to maintain high breathability rates throughout the life of the cover.
3. Vapor corrosion inhibitor (VCI) releases ion that prevents oxygen molecules from bonding with equipment, reducing corrosion up to 90%.
4. Durable outer material is waterproof, breathable, and 100% UV resistant—allows moisture to evaporate outward, thereby preventing the greenhouse effect.

Mechanical Testing Review

Cover Mechanical Properties Comparison
Conducted by Independent Laboratory – 2013

Testing Categories

• Tearing strength
• Breaking strength
• Abrasion cycles to failure
• Puncture resistance
• Seam strength

Technical Specifications