ISO 10966:2011 specifies the most important material characteristics for woven fabrics for awnings. It can also be applied to other types of fabrics. To meet the needs arising from different climatic conditions, different national habits in tent usage or different durability expectations of the customer, the material requirements are split into two levels: A and B. Level A requirements apply to awning fabrics intended for use where severe strain is caused by wind, weather or long-term use. Level B requirements are lower than level A and apply to awning fabrics intended for less severe use.