Silk – fibre with thermal insulation (maintains body heat); flexible; does not strain; resistant to creasing;
very soft, light and comfortable; resistant to dirt; low resistance; looses colour with perspiration and when exposed to direct sunlight; low resistance to moths and other insects; very demanding care in terms of washing and treatment. Silk fabrics: crepe de chine, taffeta, shantung, organza.

Wool is other Natural Fibre.