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required strength or if the wrong material has been selected to make a repair. 

New high-tech fabrics are continually being explored, especially in the area of canopy connector lines and canopy cloth. Great improvements have been made in the reduction of permeability of canopy fabrics. Permeability is a measure of the ease with which a fluid (air in this case) can move through 

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the fabric. Various forms of silicone and polyurethane coatings are used to create what we call in the vernacular, “Zero-P.” Generally, coated canopy cloth is referred to as 0 cfm (cubic foot per minute), and uncoated canopy cloth is referred to as 0-3 cfm. When we speak of porosity, we are referring to a measure of the tiny open spaces in the weave of the fabric. As canopy fabric wears, it becomes more porous and the permeability increases. 

