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Wool has a protective layer of grease, the same thing that makes your hair feels "greasy" if you don't wash your hair for a month. This grease is washed away du

• schiffern 4y ago
  > Wool has a protective layer of grease Right, it's called lanolin. It's also true that lanolin + shade and rain cover is better than lanolin alone. No protection is 100%. > degradation that you see on sun-damaged clothing is mostly on the dye "Mostly." We agree damage is done to the fiber. ;) By design, modern dyes often act to protect fibers, soaking up energetic photons before they can damage the fibers themselves. In their absence, undyed fibers can be more susceptible to damage.
• yencabulator 4y ago
  > the degradation that you see on sun-damaged clothing is mostly on the dye, not the underlying fabric itself. UV light will absolutely wreck most things, including fabric. Fabric left outdoors unprotected for a summer in Southwest US will be brittle and tear apart when handled. Plastic that isn't UV-protected will crack in about two summers. Hoses left in the sun will develop multiple leaks in 3-5 years, pretty much no matter how robust the marketing claimed they are.
  • throwuwu 4y ago
    Be careful with the distinction between synthetic materials and natural ones, they do not react to UV the same way.