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The properties of wool fabrics that are deemed the most specific and important for clinical application are springiness, resilience, low thermal conductivity, elasticity and moisture retaining and thermal insulation properties.Thermal conductivity: Due to its structure and chemical composition of keratin, wool fiber is characterized by low thermal conductivity, a property crucial for a product to be used in heat therapy.Mechanical action of wool fibres on the skin also affects blood supply to this organ. Appropriate roughness of wool fabrics produces during the use and due to non-irritating friction some extra heat. This micromassage leads to neurohormone activation, which increases superficial blood flow and rises skin temperature. Thereby, thermal and insulation properties of wool fabrics become further enhanced.Due to the aforementioned health benefits (cutaneous blood flow improvement, increase of pain threshold and lowering muscle tension), wool products might play a role in preparing tissues for exercise as well as in strengthening the therapeutic effect. The influence of these fabrics on the efficiency and quality of sleep should be again emphasized since sleep has a powerful effect on the body's natural regenerative processes both in the case of somatic and psychic problems (depression).