Translations:Adventist Youth Honors Answer Book/Recreation/Skiing Downhill/16/en
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High-end manufacturers make downhill skis out of Kevlar, boron fibers, titanium, and carbon fiber. Carbon fiber has the best strength to weight ratio of all these materials. Titanium skis are stronger than either wood or fiberglass, but are heavier and don't have as much flex. Kevlar and carbon fiber are both lightweight materials, but Kevlar is not very durable.