Vinyl coated polyester is a material frequently used for flexible fabric structures.
It is made up of a polyester scrim, a bonding or adhesive agent, and an exterior PVC coating.
This prevents damage caused by absorbed water during a freeze thaw cycle.
The PVC coating (vinyl Organisol or Plastisol) contains chemicals to achieve the desired color, water, mildew resistance, and flame retardancy.
Fabric can also be manufactured with levels of light transmission that range from very transparent to completely opaque.