This standard was developed and applies to material covers for rectangular-shaped and cylindrical cotton modules.

This performance standard applies to materials used to manufacture covers intended to protect cotton modules after harvest from rain and wind exposure during outdoor storage by minimizing the fiber quality damage and fiber loss that can occur under poor storage conditions.

Rectangular module covers are typically used over multiple harvest seasons where they experience exposure to wind and ultraviolet (UV) radiation (sunlight). For rectangular module covers, mechanical motion from wind and other sources has been found to be the dominant factor contributing to material degradation. This standard specifies a minimum ability to maintain water penetration resistance following mechanical flexing for rectangular module covers.