It is said that silk bedding is stronger than steel.A fiber of silk that is of the same diameter as a fiber of steel is said to be stronger than the steel. That is pretty durable. Cultivated silk is more durable than wild silk because silkworms grown in captivity . And because silk naturally tends to adhere to itself, the silk filaments bond themselves making them less likely to pull apart even after years of use. Silk bed sets will not deteriorate over time because of its natural fungal repellency and because chemicals are not used in processing, but this only holds true if you buy silk blanket that is 100 percent silk and not a blend of silk blend that contains silk plus other fibers that may or may not be chemical based or have been processed using chemicals .