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Animal hair fibers like wool and mohair are strong when dry, but vicuna fibers are very brittle.

This study found that African and Caucasian hair contain the most lipids, and depletion of these lipids leads to less water retention and increased water desorption, with Caucasian hair showing improved breaking tenacity after lipid extraction.

This study found that the down-hair fibers of native goats in Turkey have similar characteristics to cashmere fibers, indicating potential for high-quality textile products as a substitute.

This study found that xylanase and pectinase enzymes clean wool and specialty hair fibers as effectively as soap, without causing physical damage, whereas resinase was not effective.

In this study, extracting internal lipids from Caucasian hair fibers led to decreased water permeability, influenced by the fluidity of lipids.